Alrighty, so here is what I have done so far.
Ball Diff is complete. Lets hope it stands up to some power.
A LOT of ingenuity on my end had to go into designing it so that it works the way it should as well as dealing with working on such a small scale.
It is now secured with a nut and bolt, might swap over to a nylon locking nut for something more rugged.
Got my gear ratios worked out so now I am turning my attention to the center pulley and the spur gear (completely belt driven).
This will get done tomorrow hopefully than maybe sunday (fingers crossed) I can have it running. Thats a very optimistic fingers crossed though..