Originally Posted by RC Infos

Hello

On some kits of the first batch, it's difficult to insert the ball bearings on the differential case.

We are sorry about that, it will be corrected quickly.

To quick fix this little problem, you could simply use sand paper: cut a stripe on a sheet of #400 or #600 sandpaper, and place it around the ball bearing location on the diff case... and simply turn the case with the other hand for a few seconds.