You know, you could get some 1/8" steel differential balls instead of the pegs. They last a lot longer, are more consistant, and are cheaper.
http://www2.towerhobbies.com/cgi-bin...?&I=LX2760&P=7
These work with Kimbrough and HPI spur gears that are a direct fit to the Rustler/'Pede.
The Strobe slipper wouldn't be ideal IMO. A 51t mod1 gear won't even fit onto the Rustler/'Pede transmission. The largest I have used was a 46/49t mod1 gear (don't remember the exact tooth count). Besides that, it would be difficult to get the right gear ratio.
SH Z-Car, Custom Crawler, 8s Savage,
12s XTM XLB 1/7 buggy,
4wd 4-link rear/IFS Pro4 truck,
Custom Hyper 10 Short Course,
Belt-Drive Mammoth ST 1/8 truggy, 4s 17.5 MM Pro HPI Blitz