This lawn mower is great for scale crawlers, the body is 10x10in with a 5in hitch. The motor that it uses is a traxxas 12t 550. I power it with a extra battery in my truck and just run wires down the hitch to the motor.
STL (Stereolithography, filesize: 551 KB), DWG (AutoCAD, filesize: 970 KB)