diff --git a/Ploopy-Trackball-Kit-Assembly.md b/Ploopy-Trackball-Kit-Assembly.md
index 08178f1..8bdec21 100644
--- a/Ploopy-Trackball-Kit-Assembly.md
+++ b/Ploopy-Trackball-Kit-Assembly.md
@@ -172,6 +172,15 @@ Prepare the following parts:
 - 3x roller bearing dowels
 - 3x MR63ZZ roller bearings
 
+## Step 24.5: Clear out the scroll wheel hole in the top
+
+![](https://lh3.googleusercontent.com/pw/ACtC-3fijOYKCNh7XkUZVXjB4Odn78-LEwPq_ymUKUmCb0IOw7zPgqan3EWCd1V5B15Y9wJNHlWIiy-jGEsnKir0CZdPciT_xt_J3bZgW-DqFoHkOu-twCQRgZJa1_H1vcWmEhrXnBoxEqeAhfzlvfXRbiPv=w1292-h969-no?authuser=0)
+
+- Use the included Allen key to clear the whole in the top
+- Twist the Allen key back and forth while it is inserted
+- Use a small amount of force; if the whole is loosened too much, the scroll wheel will jostle in an unpleasant way during regular use
+- Make sure that the Allen key is inserted all of the way into the hole, so as to clear or crush obstructions
+
 ## Step 25: Put threaded inserts into top
 ![](https://lh3.googleusercontent.com/AZRRhvEGCZ_IJ9RZjR8ZGndHKCt7bzWUQkKQIJ1JnGc9ZT5m76R4nY7D2ttNMmRK0cp36_L3PTspowK9dqf_L771p9BP8J2JqaTNo049TrzKtg92dme2-Y1RzNjRm8hM2B-RAYCUOqk48JItGuXAsTZyX3InPMenO0KAcyndAHBy7WM4Ng6Gkud5TyUEC82CoP2aLyNuzm8_9_KsGo7G4lRMM7sXMyLbq9eT19eiiaC-1Sh2I_nze7uE6ODhNx8d01pbng_501aQLDSYfEeCeFZrO1K6QpY3Xvf7s2ggRq_5kAcwFiByqGjLB8akaHCWOwgHeRYRS9ikQ-_iiJwLxNK6DhwjIXeqqroyZR2XOagfvhQ_6gpgS6_XLZbQuA3NIJ8NzIzLMTQ6Ib0Cg5RRUon7OHmIqiVRGdmS5qhkrL7BAHnt7zzZk6Xt5jwoc5gxsO2KRFn7lEUI2X--3Sjnsls3lrOEWaFAGHS3dS7KSoFw7L73lIKfprZTgZrj_Al8R-IRXStA3iHm2Oz1A8CJdjwB0d3kvp9uduk77zP91YvgEs_CDmffuRP70TKaNHKeGWXOTUzqEUQ0vTJWh2jQCbl8qSvUgL1MycmwLvLllopnQDVjoLzd2bjgMFcIH3-1zgAn4DzpGfUU8ekpOcs66tjnQgFS0LieAZUjaLGKWTV9tttqOd_bObW-GA3jBB_LJKpFiZQ0NfF1hvQxHnIlSFzfuhlp2EJWIF4h00BMDMJEmB8=w1454-h969-no)