diff --git a/hardware/Mechanicals-BTU-Mod/README.md b/hardware/Mechanicals-BTU-Mod/README.md
index b7180ea..9fb7053 100644
--- a/hardware/Mechanicals-BTU-Mod/README.md
+++ b/hardware/Mechanicals-BTU-Mod/README.md
@@ -45,6 +45,8 @@ The particular BTU this mod is designed for is the Bosch-Rexroth R053010810, or
 
 (Some people consider buying cheaper nylon BTUs. But they have high internal friction and the ball actually slides on them like on a static bearing, which makes them pointless.)
 
+(NOTE: On Amazon I found "uxcell 8mm BTU 6.6lbs" in a pack of six for 16CAD, listing overall size as 14x10mm and got these to work with the regular BTU mod by adding washers around the BTUs before putting them in the holes. I put 0.7mm thick washer in the hidden holes and one 1mm washer near the right buttons, though maybe 0.8 or 0.9 in all holes would work. I am also adding the STLs for these washers while posting this edit.)
+
 ## Printing
 Follow [Ploopyco's recommendations for print settings](https://github.com/ploopyco/trackball/wiki/Appendix-B%3A-3D-printed-parts). It's also highly recommended to enable support interface and splitting the support into chunks, as otherwise it can be very hard to remove.
 
diff --git a/hardware/Mechanicals-BTU-Mod/STEP/Bearing Washer 0.7mm.step b/hardware/Mechanicals-BTU-Mod/STEP/Bearing Washer 0.7mm.step
new file mode 100644
index 0000000..d1ea8ce
--- /dev/null
+++ b/hardware/Mechanicals-BTU-Mod/STEP/Bearing Washer 0.7mm.step	
@@ -0,0 +1,206 @@
+ISO-10303-21;
+HEADER;
+/* Generated by software containing ST-Developer
+ * from STEP Tools, Inc. (www.steptools.com) 
+ */
+
+FILE_DESCRIPTION(
+/* description */ ('',
+'CAx-IF Rec.Pracs.---Representation and Presentation of Product Manufa
+cturing Information (PMI)---4.0---2014-10-13'),
+/* implementation_level */ '2;1');
+
+FILE_NAME(
+/* name */ 'Bearing Washer 0.7mm.step',
+/* time_stamp */ '2025-02-13T19:42:19Z',
+/* author */ (''),
+/* organization */ (''),
+/* preprocessor_version */ 'ST-DEVELOPER v20',
+/* originating_system */ 'Autodesk Translation Framework v13.20.0.188',
+
+/* authorisation */ '');
+
+FILE_SCHEMA (('AP242_MANAGED_MODEL_BASED_3D_ENGINEERING_MIM_LF { 1 0 10303 442 1 1 4 }'));
+ENDSEC;
+
+DATA;
+#10=MECHANICAL_DESIGN_GEOMETRIC_PRESENTATION_REPRESENTATION('',(#13),#125);
+#11=SHAPE_REPRESENTATION_RELATIONSHIP('SRR','None',#132,#12);
+#12=ADVANCED_BREP_SHAPE_REPRESENTATION('',(#14),#124);
+#13=STYLED_ITEM('',(#141),#14);
+#14=MANIFOLD_SOLID_BREP('Body1',#65);
+#15=FACE_BOUND('',#26,.T.);
+#16=FACE_BOUND('',#28,.T.);
+#17=PLANE('',#85);
+#18=PLANE('',#86);
+#19=FACE_OUTER_BOUND('',#23,.T.);
+#20=FACE_OUTER_BOUND('',#24,.T.);
+#21=FACE_OUTER_BOUND('',#25,.T.);
+#22=FACE_OUTER_BOUND('',#27,.T.);
+#23=EDGE_LOOP('',(#47,#48,#49,#50));
+#24=EDGE_LOOP('',(#51,#52,#53,#54));
+#25=EDGE_LOOP('',(#55));
+#26=EDGE_LOOP('',(#56));
+#27=EDGE_LOOP('',(#57));
+#28=EDGE_LOOP('',(#58));
+#29=LINE('',#112,#31);
+#30=LINE('',#118,#32);
+#31=VECTOR('',#93,6.35);
+#32=VECTOR('',#100,8.1);
+#33=CIRCLE('',#80,6.35);
+#34=CIRCLE('',#81,6.35);
+#35=CIRCLE('',#83,8.1);
+#36=CIRCLE('',#84,8.1);
+#37=VERTEX_POINT('',#109);
+#38=VERTEX_POINT('',#111);
+#39=VERTEX_POINT('',#115);
+#40=VERTEX_POINT('',#117);
+#41=EDGE_CURVE('',#37,#37,#33,.T.);
+#42=EDGE_CURVE('',#37,#38,#29,.T.);
+#43=EDGE_CURVE('',#38,#38,#34,.T.);
+#44=EDGE_CURVE('',#39,#39,#35,.T.);
+#45=EDGE_CURVE('',#39,#40,#30,.T.);
+#46=EDGE_CURVE('',#40,#40,#36,.T.);
+#47=ORIENTED_EDGE('',*,*,#41,.F.);
+#48=ORIENTED_EDGE('',*,*,#42,.T.);
+#49=ORIENTED_EDGE('',*,*,#43,.T.);
+#50=ORIENTED_EDGE('',*,*,#42,.F.);
+#51=ORIENTED_EDGE('',*,*,#44,.F.);
+#52=ORIENTED_EDGE('',*,*,#45,.T.);
+#53=ORIENTED_EDGE('',*,*,#46,.T.);
+#54=ORIENTED_EDGE('',*,*,#45,.F.);
+#55=ORIENTED_EDGE('',*,*,#44,.T.);
+#56=ORIENTED_EDGE('',*,*,#41,.T.);
+#57=ORIENTED_EDGE('',*,*,#46,.F.);
+#58=ORIENTED_EDGE('',*,*,#43,.F.);
+#59=CYLINDRICAL_SURFACE('',#79,6.35);
+#60=CYLINDRICAL_SURFACE('',#82,8.1);
+#61=ADVANCED_FACE('',(#19),#59,.F.);
+#62=ADVANCED_FACE('',(#20),#60,.T.);
+#63=ADVANCED_FACE('',(#21,#15),#17,.T.);
+#64=ADVANCED_FACE('',(#22,#16),#18,.F.);
+#65=CLOSED_SHELL('',(#61,#62,#63,#64));
+#66=DERIVED_UNIT_ELEMENT(#68,1.);
+#67=DERIVED_UNIT_ELEMENT(#127,-3.);
+#68=(
+MASS_UNIT()
+NAMED_UNIT(*)
+SI_UNIT(.KILO.,.GRAM.)
+);
+#69=DERIVED_UNIT((#66,#67));
+#70=MEASURE_REPRESENTATION_ITEM('density measure',
+POSITIVE_RATIO_MEASURE(7850.),#69);
+#71=PROPERTY_DEFINITION_REPRESENTATION(#76,#73);
+#72=PROPERTY_DEFINITION_REPRESENTATION(#77,#74);
+#73=REPRESENTATION('material name',(#75),#124);
+#74=REPRESENTATION('density',(#70),#124);
+#75=DESCRIPTIVE_REPRESENTATION_ITEM('Steel','Steel');
+#76=PROPERTY_DEFINITION('material property','material name',#134);
+#77=PROPERTY_DEFINITION('material property','density of part',#134);
+#78=AXIS2_PLACEMENT_3D('',#107,#87,#88);
+#79=AXIS2_PLACEMENT_3D('',#108,#89,#90);
+#80=AXIS2_PLACEMENT_3D('',#110,#91,#92);
+#81=AXIS2_PLACEMENT_3D('',#113,#94,#95);
+#82=AXIS2_PLACEMENT_3D('',#114,#96,#97);
+#83=AXIS2_PLACEMENT_3D('',#116,#98,#99);
+#84=AXIS2_PLACEMENT_3D('',#119,#101,#102);
+#85=AXIS2_PLACEMENT_3D('',#120,#103,#104);
+#86=AXIS2_PLACEMENT_3D('',#121,#105,#106);
+#87=DIRECTION('axis',(0.,0.,1.));
+#88=DIRECTION('refdir',(1.,0.,0.));
+#89=DIRECTION('center_axis',(1.,0.,0.));
+#90=DIRECTION('ref_axis',(0.,1.,0.));
+#91=DIRECTION('center_axis',(-1.,0.,0.));
+#92=DIRECTION('ref_axis',(0.,1.,0.));
+#93=DIRECTION('',(-1.,0.,0.));
+#94=DIRECTION('center_axis',(-1.,0.,0.));
+#95=DIRECTION('ref_axis',(0.,1.,0.));
+#96=DIRECTION('center_axis',(1.,0.,0.));
+#97=DIRECTION('ref_axis',(0.,1.,0.));
+#98=DIRECTION('center_axis',(1.,0.,0.));
+#99=DIRECTION('ref_axis',(0.,1.,0.));
+#100=DIRECTION('',(-1.,0.,0.));
+#101=DIRECTION('center_axis',(1.,0.,0.));
+#102=DIRECTION('ref_axis',(0.,1.,0.));
+#103=DIRECTION('center_axis',(1.,0.,0.));
+#104=DIRECTION('ref_axis',(0.,1.,0.));
+#105=DIRECTION('center_axis',(1.,0.,0.));
+#106=DIRECTION('ref_axis',(0.,1.,0.));
+#107=CARTESIAN_POINT('',(0.,0.,0.));
+#108=CARTESIAN_POINT('Origin',(0.,0.,0.));
+#109=CARTESIAN_POINT('',(0.7,-6.35,-7.77650717458569E-16));
+#110=CARTESIAN_POINT('Origin',(0.7,0.,0.));
+#111=CARTESIAN_POINT('',(0.,-6.35,-7.77650717458569E-16));
+#112=CARTESIAN_POINT('',(0.,-6.35,-7.77650717458569E-16));
+#113=CARTESIAN_POINT('Origin',(0.,0.,0.));
+#114=CARTESIAN_POINT('Origin',(0.,0.,0.));
+#115=CARTESIAN_POINT('',(0.7,-8.1,-9.91963907309356E-16));
+#116=CARTESIAN_POINT('Origin',(0.7,0.,0.));
+#117=CARTESIAN_POINT('',(0.,-8.1,-9.91963907309356E-16));
+#118=CARTESIAN_POINT('',(0.,-8.1,-9.91963907309356E-16));
+#119=CARTESIAN_POINT('Origin',(0.,0.,0.));
+#120=CARTESIAN_POINT('Origin',(0.7,0.,0.));
+#121=CARTESIAN_POINT('Origin',(0.,0.,0.));
+#122=UNCERTAINTY_MEASURE_WITH_UNIT(LENGTH_MEASURE(0.01),#126,
+'DISTANCE_ACCURACY_VALUE',
+'Maximum model space distance between geometric entities at asserted c
+onnectivities');
+#123=UNCERTAINTY_MEASURE_WITH_UNIT(LENGTH_MEASURE(0.01),#126,
+'DISTANCE_ACCURACY_VALUE',
+'Maximum model space distance between geometric entities at asserted c
+onnectivities');
+#124=(
+GEOMETRIC_REPRESENTATION_CONTEXT(3)
+GLOBAL_UNCERTAINTY_ASSIGNED_CONTEXT((#122))
+GLOBAL_UNIT_ASSIGNED_CONTEXT((#126,#128,#129))
+REPRESENTATION_CONTEXT('','3D')
+);
+#125=(
+GEOMETRIC_REPRESENTATION_CONTEXT(3)
+GLOBAL_UNCERTAINTY_ASSIGNED_CONTEXT((#123))
+GLOBAL_UNIT_ASSIGNED_CONTEXT((#126,#128,#129))
+REPRESENTATION_CONTEXT('','3D')
+);
+#126=(
+LENGTH_UNIT()
+NAMED_UNIT(*)
+SI_UNIT(.MILLI.,.METRE.)
+);
+#127=(
+LENGTH_UNIT()
+NAMED_UNIT(*)
+SI_UNIT($,.METRE.)
+);
+#128=(
+NAMED_UNIT(*)
+PLANE_ANGLE_UNIT()
+SI_UNIT($,.RADIAN.)
+);
+#129=(
+NAMED_UNIT(*)
+SI_UNIT($,.STERADIAN.)
+SOLID_ANGLE_UNIT()
+);
+#130=SHAPE_DEFINITION_REPRESENTATION(#131,#132);
+#131=PRODUCT_DEFINITION_SHAPE('',$,#134);
+#132=SHAPE_REPRESENTATION('',(#78),#124);
+#133=PRODUCT_DEFINITION_CONTEXT('part definition',#138,'design');
+#134=PRODUCT_DEFINITION('Bearing Washer 0.7mm',
+'Bearing Washer 0.7mm v2',#135,#133);
+#135=PRODUCT_DEFINITION_FORMATION('',$,#140);
+#136=PRODUCT_RELATED_PRODUCT_CATEGORY('Bearing Washer 0.7mm v2',
+'Bearing Washer 0.7mm v2',(#140));
+#137=APPLICATION_PROTOCOL_DEFINITION('international standard',
+'ap242_managed_model_based_3d_engineering',2011,#138);
+#138=APPLICATION_CONTEXT('Managed model based 3d engineering');
+#139=PRODUCT_CONTEXT('part definition',#138,'mechanical');
+#140=PRODUCT('Bearing Washer 0.7mm','Bearing Washer 0.7mm v2',$,(#139));
+#141=PRESENTATION_STYLE_ASSIGNMENT((#142));
+#142=SURFACE_STYLE_USAGE(.BOTH.,#143);
+#143=SURFACE_SIDE_STYLE('',(#144));
+#144=SURFACE_STYLE_FILL_AREA(#145);
+#145=FILL_AREA_STYLE('Steel - Satin',(#146));
+#146=FILL_AREA_STYLE_COLOUR('Steel - Satin',#147);
+#147=COLOUR_RGB('Steel - Satin',0.627450980392157,0.627450980392157,0.627450980392157);
+ENDSEC;
+END-ISO-10303-21;
diff --git a/hardware/Mechanicals-BTU-Mod/STEP/Bearing Washer 1mm.step b/hardware/Mechanicals-BTU-Mod/STEP/Bearing Washer 1mm.step
new file mode 100644
index 0000000..3de0fa1
--- /dev/null
+++ b/hardware/Mechanicals-BTU-Mod/STEP/Bearing Washer 1mm.step	
@@ -0,0 +1,206 @@
+ISO-10303-21;
+HEADER;
+/* Generated by software containing ST-Developer
+ * from STEP Tools, Inc. (www.steptools.com) 
+ */
+
+FILE_DESCRIPTION(
+/* description */ ('',
+'CAx-IF Rec.Pracs.---Representation and Presentation of Product Manufa
+cturing Information (PMI)---4.0---2014-10-13'),
+/* implementation_level */ '2;1');
+
+FILE_NAME(
+/* name */ 'Bearing Washer 1mm.step',
+/* time_stamp */ '2025-02-13T19:42:08Z',
+/* author */ (''),
+/* organization */ (''),
+/* preprocessor_version */ 'ST-DEVELOPER v20',
+/* originating_system */ 'Autodesk Translation Framework v13.20.0.188',
+
+/* authorisation */ '');
+
+FILE_SCHEMA (('AP242_MANAGED_MODEL_BASED_3D_ENGINEERING_MIM_LF { 1 0 10303 442 1 1 4 }'));
+ENDSEC;
+
+DATA;
+#10=MECHANICAL_DESIGN_GEOMETRIC_PRESENTATION_REPRESENTATION('',(#13),#125);
+#11=SHAPE_REPRESENTATION_RELATIONSHIP('SRR','None',#132,#12);
+#12=ADVANCED_BREP_SHAPE_REPRESENTATION('',(#14),#124);
+#13=STYLED_ITEM('',(#141),#14);
+#14=MANIFOLD_SOLID_BREP('Body1',#65);
+#15=FACE_BOUND('',#26,.T.);
+#16=FACE_BOUND('',#28,.T.);
+#17=PLANE('',#85);
+#18=PLANE('',#86);
+#19=FACE_OUTER_BOUND('',#23,.T.);
+#20=FACE_OUTER_BOUND('',#24,.T.);
+#21=FACE_OUTER_BOUND('',#25,.T.);
+#22=FACE_OUTER_BOUND('',#27,.T.);
+#23=EDGE_LOOP('',(#47,#48,#49,#50));
+#24=EDGE_LOOP('',(#51,#52,#53,#54));
+#25=EDGE_LOOP('',(#55));
+#26=EDGE_LOOP('',(#56));
+#27=EDGE_LOOP('',(#57));
+#28=EDGE_LOOP('',(#58));
+#29=LINE('',#112,#31);
+#30=LINE('',#118,#32);
+#31=VECTOR('',#93,6.35);
+#32=VECTOR('',#100,8.1);
+#33=CIRCLE('',#80,6.35);
+#34=CIRCLE('',#81,6.35);
+#35=CIRCLE('',#83,8.1);
+#36=CIRCLE('',#84,8.1);
+#37=VERTEX_POINT('',#109);
+#38=VERTEX_POINT('',#111);
+#39=VERTEX_POINT('',#115);
+#40=VERTEX_POINT('',#117);
+#41=EDGE_CURVE('',#37,#37,#33,.T.);
+#42=EDGE_CURVE('',#37,#38,#29,.T.);
+#43=EDGE_CURVE('',#38,#38,#34,.T.);
+#44=EDGE_CURVE('',#39,#39,#35,.T.);
+#45=EDGE_CURVE('',#39,#40,#30,.T.);
+#46=EDGE_CURVE('',#40,#40,#36,.T.);
+#47=ORIENTED_EDGE('',*,*,#41,.F.);
+#48=ORIENTED_EDGE('',*,*,#42,.T.);
+#49=ORIENTED_EDGE('',*,*,#43,.T.);
+#50=ORIENTED_EDGE('',*,*,#42,.F.);
+#51=ORIENTED_EDGE('',*,*,#44,.F.);
+#52=ORIENTED_EDGE('',*,*,#45,.T.);
+#53=ORIENTED_EDGE('',*,*,#46,.T.);
+#54=ORIENTED_EDGE('',*,*,#45,.F.);
+#55=ORIENTED_EDGE('',*,*,#44,.T.);
+#56=ORIENTED_EDGE('',*,*,#41,.T.);
+#57=ORIENTED_EDGE('',*,*,#46,.F.);
+#58=ORIENTED_EDGE('',*,*,#43,.F.);
+#59=CYLINDRICAL_SURFACE('',#79,6.35);
+#60=CYLINDRICAL_SURFACE('',#82,8.1);
+#61=ADVANCED_FACE('',(#19),#59,.F.);
+#62=ADVANCED_FACE('',(#20),#60,.T.);
+#63=ADVANCED_FACE('',(#21,#15),#17,.T.);
+#64=ADVANCED_FACE('',(#22,#16),#18,.F.);
+#65=CLOSED_SHELL('',(#61,#62,#63,#64));
+#66=DERIVED_UNIT_ELEMENT(#68,1.);
+#67=DERIVED_UNIT_ELEMENT(#127,-3.);
+#68=(
+MASS_UNIT()
+NAMED_UNIT(*)
+SI_UNIT(.KILO.,.GRAM.)
+);
+#69=DERIVED_UNIT((#66,#67));
+#70=MEASURE_REPRESENTATION_ITEM('density measure',
+POSITIVE_RATIO_MEASURE(7850.),#69);
+#71=PROPERTY_DEFINITION_REPRESENTATION(#76,#73);
+#72=PROPERTY_DEFINITION_REPRESENTATION(#77,#74);
+#73=REPRESENTATION('material name',(#75),#124);
+#74=REPRESENTATION('density',(#70),#124);
+#75=DESCRIPTIVE_REPRESENTATION_ITEM('Steel','Steel');
+#76=PROPERTY_DEFINITION('material property','material name',#134);
+#77=PROPERTY_DEFINITION('material property','density of part',#134);
+#78=AXIS2_PLACEMENT_3D('',#107,#87,#88);
+#79=AXIS2_PLACEMENT_3D('',#108,#89,#90);
+#80=AXIS2_PLACEMENT_3D('',#110,#91,#92);
+#81=AXIS2_PLACEMENT_3D('',#113,#94,#95);
+#82=AXIS2_PLACEMENT_3D('',#114,#96,#97);
+#83=AXIS2_PLACEMENT_3D('',#116,#98,#99);
+#84=AXIS2_PLACEMENT_3D('',#119,#101,#102);
+#85=AXIS2_PLACEMENT_3D('',#120,#103,#104);
+#86=AXIS2_PLACEMENT_3D('',#121,#105,#106);
+#87=DIRECTION('axis',(0.,0.,1.));
+#88=DIRECTION('refdir',(1.,0.,0.));
+#89=DIRECTION('center_axis',(1.,0.,0.));
+#90=DIRECTION('ref_axis',(0.,1.,0.));
+#91=DIRECTION('center_axis',(-1.,0.,0.));
+#92=DIRECTION('ref_axis',(0.,1.,0.));
+#93=DIRECTION('',(-1.,0.,0.));
+#94=DIRECTION('center_axis',(-1.,0.,0.));
+#95=DIRECTION('ref_axis',(0.,1.,0.));
+#96=DIRECTION('center_axis',(1.,0.,0.));
+#97=DIRECTION('ref_axis',(0.,1.,0.));
+#98=DIRECTION('center_axis',(1.,0.,0.));
+#99=DIRECTION('ref_axis',(0.,1.,0.));
+#100=DIRECTION('',(-1.,0.,0.));
+#101=DIRECTION('center_axis',(1.,0.,0.));
+#102=DIRECTION('ref_axis',(0.,1.,0.));
+#103=DIRECTION('center_axis',(1.,0.,0.));
+#104=DIRECTION('ref_axis',(0.,1.,0.));
+#105=DIRECTION('center_axis',(1.,0.,0.));
+#106=DIRECTION('ref_axis',(0.,1.,0.));
+#107=CARTESIAN_POINT('',(0.,0.,0.));
+#108=CARTESIAN_POINT('Origin',(0.,0.,0.));
+#109=CARTESIAN_POINT('',(1.,-6.35,-7.77650717458569E-16));
+#110=CARTESIAN_POINT('Origin',(1.,0.,0.));
+#111=CARTESIAN_POINT('',(0.,-6.35,-7.77650717458569E-16));
+#112=CARTESIAN_POINT('',(0.,-6.35,-7.77650717458569E-16));
+#113=CARTESIAN_POINT('Origin',(0.,0.,0.));
+#114=CARTESIAN_POINT('Origin',(0.,0.,0.));
+#115=CARTESIAN_POINT('',(1.,-8.1,-9.91963907309356E-16));
+#116=CARTESIAN_POINT('Origin',(1.,0.,0.));
+#117=CARTESIAN_POINT('',(0.,-8.1,-9.91963907309356E-16));
+#118=CARTESIAN_POINT('',(0.,-8.1,-9.91963907309356E-16));
+#119=CARTESIAN_POINT('Origin',(0.,0.,0.));
+#120=CARTESIAN_POINT('Origin',(1.,0.,0.));
+#121=CARTESIAN_POINT('Origin',(0.,0.,0.));
+#122=UNCERTAINTY_MEASURE_WITH_UNIT(LENGTH_MEASURE(0.01),#126,
+'DISTANCE_ACCURACY_VALUE',
+'Maximum model space distance between geometric entities at asserted c
+onnectivities');
+#123=UNCERTAINTY_MEASURE_WITH_UNIT(LENGTH_MEASURE(0.01),#126,
+'DISTANCE_ACCURACY_VALUE',
+'Maximum model space distance between geometric entities at asserted c
+onnectivities');
+#124=(
+GEOMETRIC_REPRESENTATION_CONTEXT(3)
+GLOBAL_UNCERTAINTY_ASSIGNED_CONTEXT((#122))
+GLOBAL_UNIT_ASSIGNED_CONTEXT((#126,#128,#129))
+REPRESENTATION_CONTEXT('','3D')
+);
+#125=(
+GEOMETRIC_REPRESENTATION_CONTEXT(3)
+GLOBAL_UNCERTAINTY_ASSIGNED_CONTEXT((#123))
+GLOBAL_UNIT_ASSIGNED_CONTEXT((#126,#128,#129))
+REPRESENTATION_CONTEXT('','3D')
+);
+#126=(
+LENGTH_UNIT()
+NAMED_UNIT(*)
+SI_UNIT(.MILLI.,.METRE.)
+);
+#127=(
+LENGTH_UNIT()
+NAMED_UNIT(*)
+SI_UNIT($,.METRE.)
+);
+#128=(
+NAMED_UNIT(*)
+PLANE_ANGLE_UNIT()
+SI_UNIT($,.RADIAN.)
+);
+#129=(
+NAMED_UNIT(*)
+SI_UNIT($,.STERADIAN.)
+SOLID_ANGLE_UNIT()
+);
+#130=SHAPE_DEFINITION_REPRESENTATION(#131,#132);
+#131=PRODUCT_DEFINITION_SHAPE('',$,#134);
+#132=SHAPE_REPRESENTATION('',(#78),#124);
+#133=PRODUCT_DEFINITION_CONTEXT('part definition',#138,'design');
+#134=PRODUCT_DEFINITION('Bearing Washer 1mm','Bearing Washer 1mm v1',#135,
+#133);
+#135=PRODUCT_DEFINITION_FORMATION('',$,#140);
+#136=PRODUCT_RELATED_PRODUCT_CATEGORY('Bearing Washer 1mm v1',
+'Bearing Washer 1mm v1',(#140));
+#137=APPLICATION_PROTOCOL_DEFINITION('international standard',
+'ap242_managed_model_based_3d_engineering',2011,#138);
+#138=APPLICATION_CONTEXT('Managed model based 3d engineering');
+#139=PRODUCT_CONTEXT('part definition',#138,'mechanical');
+#140=PRODUCT('Bearing Washer 1mm','Bearing Washer 1mm v1',$,(#139));
+#141=PRESENTATION_STYLE_ASSIGNMENT((#142));
+#142=SURFACE_STYLE_USAGE(.BOTH.,#143);
+#143=SURFACE_SIDE_STYLE('',(#144));
+#144=SURFACE_STYLE_FILL_AREA(#145);
+#145=FILL_AREA_STYLE('Steel - Satin',(#146));
+#146=FILL_AREA_STYLE_COLOUR('Steel - Satin',#147);
+#147=COLOUR_RGB('Steel - Satin',0.627450980392157,0.627450980392157,0.627450980392157);
+ENDSEC;
+END-ISO-10303-21;
diff --git a/hardware/Mechanicals-BTU-Mod/STL/Bearing Washer 0.7mm.stl b/hardware/Mechanicals-BTU-Mod/STL/Bearing Washer 0.7mm.stl
new file mode 100644
index 0000000..7c96f51
Binary files /dev/null and b/hardware/Mechanicals-BTU-Mod/STL/Bearing Washer 0.7mm.stl differ
diff --git a/hardware/Mechanicals-BTU-Mod/STL/Bearing Washer 1mm.stl b/hardware/Mechanicals-BTU-Mod/STL/Bearing Washer 1mm.stl
new file mode 100644
index 0000000..2684117
Binary files /dev/null and b/hardware/Mechanicals-BTU-Mod/STL/Bearing Washer 1mm.stl differ