Looking around some more. Good ol google found a
BL center diff thread, Serum's no less. :)
Interesting little part Mike made up:
Kinda what I want to do, but also like this:
This guy did what I was thinking in alot of ways. Its a center diff streched across the TVPs. My thoughts were to incorporate a BL motor mount. A bit like the RCM part above, but really I want to run the motor forwards along side the steering servo and leave the whole area where the smoker was open for batts and ESC. It looks like he used a hyper mount and posts. If I could find posts long enough, it may be the easy way to go.
I did look for a Pirate center spool. Impossible to find. Think I just will go w/ a CD. Worst of just pack it really stiffly, and then I can go to the slipperential once its done. I've seen the prototype and its cool.