Why are you using a 3s lipo? Isn't 2s good enough? Wouldn't a 1s2p be perfect? (I don't know much about crawlers btw)
It's perfect for the Sidewinder and 87/14 gearing. At least it's not too slow for my son's driving .
Castle Neu 1520 on 6S LiPo Powered Gmaxx (Nitro Killer)
Predator with OS .21TM
Supermaxx with Mach .26
Revo with OS .18TZ
Kyosho ST-RR Conversion
Ofna CR with Tekin ESC/Motor (2)