add note on bushing fix

README.md

@@ -42,6 +42,8 @@ Make sure to change 'type' to .step, and check the 'save to my computer' box. No
 
 #### [RCTN23-0375HDPE Fusion CAD File](cad/RCTN23-0375HDPE_v5.f3d)
 
+#### [pulleys-that-are-the-wrong-size-hotfix](cad/nema23-8mm-to-6-35mm-bushing.stl)
+
 #### BOM N23 0375HDPE
 
 Type | Size | QTY | Where Used | McMaster PN