Wide rear ales...
Toomany- depending on which version you have you can use the 50808 TG10 Long Wheel Axle with the 10mm hexes...these use the standard steel dogbones like every car in world (does anyone really know why Tamiya invented those gynormous plastic bones anyway?) so you may have to change your outdrives and bones if you have the first type:
50883 39mm Drive Shaft Set
53790 Cup Joint For Universal Shaft (for KIT GEAR DIFFS)
53806 Drive Cups (if you have BALL DIFFS INSTALLED)
BTW- Bucks, did the TCS tecHs give you any guff about running the F201 gear in TCS races? seems like it might violate the "on the chassis it was designed for" clause...or was it more of a "don't ask, don't tell" kinda thing?
-Cheers