yesterday at work i got to thinking, got home, ditched the bce chassis and successfully mounted the x7 radio tray and center diff mount/brakes on the x6r chassis with slight modification to the front of the radio tray to allow full steering clearance. it all fits nicely actually. lining up and using the front 2 holes for the receiver box (instead of the front holes of the tray) moved the tray forward enough so that the brake/throttle linkage lined up perfectly. ill post pics soon