Here are some pictures of my gmaxx. Right now, it has Lutach's 6S ESC and Castle 2200Kv motor. Spur/pinion combo is 46/15. It also has 8 spider diff gears in there.
It's longer than a regular gmaxx because of the monoblock and setback arms.
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)