setting up a slash with 3s and 9l

[rootar]

well after runign agianist 4 slashes in the electric class last night, they just look too damn cool, so ive got one coming and im gonna retire the ls10 for awhile because i have ruined my last set off drive cups and nobody has any and hotbodies doesnt know when they will be shipping more out ... so until i can get parts the slash will be running:

-Mamba Max w/ CC bec
-9L
-maxamps 3s 5000
-mike motor clamp/heatsink

in the r/c calculations page im coming up with a 70t 32p spur and a 20t 32p (5mm bore) pinion, will this gearing fit on the tranny or what do i need, some one let me know. That would be gearing it for 40mph since i think anything over this is just gonna be a waist plus the MM and 9L wont even break a sweat. Or what do yall think i should gear it at?

what else do i need for the slash? i figure ill have to do some dremel work to let the heatsink/clamp fit but thats no big deal. ive alreay got better springs since after seeing first hand they are spung too soft. The slashes do jump a bit better than a regular 1/10th due to the longer wheel base.

how well does the vxl style tranny hold up to a system like im gonna be putting in the slash?