diff --git a/3.-Enclosure-assembly.md b/3.-Enclosure-assembly.md
index c3e61d4..773ea83 100644
--- a/3.-Enclosure-assembly.md
+++ b/3.-Enclosure-assembly.md
@@ -27,8 +27,8 @@ If you don't the capability to print the 3D-printed parts, then it's no big deal
 
 - 2x M3x6mm socket cap machine screws
 - 6x heat-set threaded inserts
-- 3x roller bearings
-- 2x metal dowels
+- 3x MR63ZZ roller bearings
+- 2x 3mm x 18mm metal dowels
 - 1x silicone ring
 
 If you don't have the hardware, be not afraid. **We sell hardware kits**, and we also have a few tips on how to order these parts. See [[Appendix D: Hardware]] for information.
@@ -88,26 +88,43 @@ The electronics assembly is seated on the base, but it does not attach. It will
 ## Step 12: Screw primary buttons into base
 **TODO PIX**
 
-## Step 13: Preparing the top
+## Step 13: Prepare scroll wheel
+
+Prepare the following components:
+
+- Scroll wheel
+- Silicone ring
+- 2x 3mm x 18mm metal dowels
+
+## Step 14: Insert dowels into scroll wheel
+**TODO pix**
+
+## Step 15: Thread silicone ring onto scroll wheel
+**TODO pix**
+
+## Step 16: Insert scroll wheel into base
+**TODO pix**
+
+## Step 17: Preparing the top
 **TODO PIX**
 
 - Top
 - 4x heat-set threaded inserts
 - 3x roller bearing dowels
-- 3x roller bearings
+- 3x MR63ZZ roller bearings
 
-## Step 14: Put threaded inserts into top
+## Step 18: Put threaded inserts into top
 **TODO PIX**
 
 Take your time and go slowly. A soldering iron temperature of 350C or 620F is hot enough.
 
-## Step 15: Put roller bearings onto roller bearing dowels
+## Step 19: Put roller bearings onto roller bearing dowels
 **TODO PIX**
 
-## Step 16: Insert roller bearings into top
+## Step 20: Insert roller bearings into top
 **TODO PIX**
 
-## Step 17: All done!
+## Step 21: All done!
 **TODO PIX completed enclosure halves**
 
 Congrats, you finished assembling the enclosure! Pat yourself on the back.