[Tottanka]

I might be totally wrong here, but i think there is a huge problem with this design.
The chains going to the omni wheels in the center should not be there. Imagine what happens if two mechanums on the same are rotating in different directions in order to create a strafe movement, what happens is that the sprocket on the center omni wheel is getting pulled by one chain forwards, and by the other one backwards, thus, assuming the powers are equal it will not rotate at all, and the mechanums will not rotate either, and therefore you will never be able to strafe.
If i am correct, you have to consider removing those chains, and leaving the center omni wheel unpowered, or powered by a different motor.

Can someone more experienced tell me if i am correct here?