This is my soon to be finished crt.5 it has the extended chassis with a Nemesis 7L brushless motor. I have a Mamba Max ESC and a 3s lipo battery,The battery tray is bolted in 3 spots using existing chassis holes.The battery has velcro on the tray to hold it firmly inplace in addition to the tekno straps.I bought a piece of 4mm carbonfiber plate to fabricate a ESC and receiver mount to go on top of the center diff mount.