I ran the 7200's in my 4pede vxl for quite a while. Battery tray is pretty short in that thing.SMC True Spec 2s 7.4V 6500mAh LiPo battery for my sons Stampede.
Stopped at the hardware store for some bits. Got some more 1/8" rivets, washers, thin metal plating and other things. Going to try to figure out a way to support the gopro on the savageX, revo 3.3 and possibly outcast hood so I don't totally destroy the bodies. Figure a metal plate riveted underneath supporting the velcro strap around the camera will help spread the load a bit.
Can't wait for my outcast unbreakable body to show up... my current body is held together with spit and glue!