I used to have a CX2, but don't have one anymore. I looked at the manual, and there should be a bearing at the top of the frame and one at the bottom where the inner shaft exits (part EFLH1215). At the base of the gears, you should have an retaining collar (part EFLH1214). See page 26 of the [link=http://www.horizonhobby.com/ProdInfo/Files/Blade_CX2_Manual.pdf]manual[/link].