diff --git a/Ploopy-Trackball-Kit-Assembly,-Revision-D.md b/Ploopy-Trackball-Kit-Assembly,-Revision-D.md
index 2b46c09..b403b1d 100644
--- a/Ploopy-Trackball-Kit-Assembly,-Revision-D.md
+++ b/Ploopy-Trackball-Kit-Assembly,-Revision-D.md
@@ -214,10 +214,13 @@ Silicone is quite strong and doesn't rip easily.
 
 The plastic parts can flex to accommodate the angle at which the wheel is inserted. Nice and gentle, now.
 
+## STOP! Read the next step fully before continuing.
+
 ## Step 26: Screw primary buttons into base
 ![](https://lh3.googleusercontent.com/pw/AM-JKLVp-g3mUd-_s9lIK_k5tEujmDvcXFikbZMOLxxoGmvB-2Fd3Nxfvx8IPORStE51aP5KpFK6lO4ZCrRJELd33czIelp81WmVGKLa9np0Q5JL_HEV31QivpvbbrbjwLSxCryUHZSQTyuttSzfQ05Lc50t=w1163-h775-no?authuser=0)
 
-When driving the screw, use your free hand to *gently* twist the primary buttons **clockwise** (towards the PCB). This will ensure that the distance between the buttons and the switches is correct.
+- Go slowly. Driving this screw too deeply will cause the primary buttons to crack.
+- When driving the screw, use your free hand to *gently* twist the primary buttons **clockwise** (towards the PCB). This will ensure that the distance between the buttons and the switches is correct.
 
 Again, just like for the secondary buttons, a common problem that occurs once the top is placed onto the mouse is that these buttons will become stuck. If that is the case, take the top off the mouse and adjust the primary buttons. You can twist them either clockwise or counterclockwise by about a degree or so, while keeping them flat against the base. Eventually, you should be able to find a position that allows the buttons to operate correctly.