Report as inappropriate

In step 10, you have one bearing that rides in the slot in the eccentric, and the second bearing rides in the slot in the side piece. The two bearings end up side-by-side, but they are sliding in slots in different parts. If this is not clear, look at the Gyroman3D.pdf file. With the 3D PDF, you can selectively hide some parts (or even make them transparent) so that you can see what's going on inside the assembly.