So I sold/traded my flm tranny forward chassis, and have a complete X just hanging around, never ran. I decided to pick up a flux motor mount and plate, and maybe make my own tvps...
Mocked it up using a stock X rear center driveshaft, and a lst1 wheel cvd for the front center driveshaft. This stretches the wheelbase to around 16". Gives enough room to mount the lipo in front of the tranny, inside the tvps. Plan to use some al servo mounts to mount the servo to the inside of the tvp on one side. That should give enough room to fit the lipo in there.
Going to run a 1515 2d and a 5s 5000 25c lipo. Might run a quark 125 or a MMM.