[MattRain]

When I build at least, I create my frame of the robot and what-not. When I want to get into the wheels and gears, I do the following. From there I take a gear, and I set it to Pin, and align the hole of the frame and the centered gear and the face of which I want touching/facing the frame. From there I build off the gear, i.e. wheels, axles, collars. If you set your gear to pin when first placing it, it should only move the gear, and whatever has been "attached" to the gear when you hold alt and ctrl.