Wow so many eager questions!

Batfish: Just using good ol' velcro on a sealed LRP 1200 pack

Gustav: The mini quake tires are 37mm wide mounted on 26mm wheels and have ID of 47mm when the Proline speed 10's have an OD of 38mm, so no cutting was involved and when they're stretched over the TC wheels, they look strikingly similar to bow tie 40's mounted on wabash 40's.

CG: That's a T3 dogbone connecting the two diffs, but a MT2 would be better for a longer WB.