[RC-Monster Mike]

I run a Lehner basic xl2400 on 5s Lipo packs. It weighs right around 8 pounds RTR. I also have the UE VBS on mine, though. If you raise the servo up, you can get the 8 cells flat on the lower chassis plate. There should have a been a couple spacers in the kit. If not, just put a spacer under the servo(on top of servo plate) between the servo and the upper plate to raise the servos out of the way.