BE REAL HERE.......WHO USES NICAD ANYMORE!! I am using a Lipo battery that is as stated 8.23 oz.. What I have determined is that I will have to switch the location of the battery, reciever and ESC by building a ramp forward (over the reciever/ESC location) to support the battery and use the designed battery tray for the reciever/ESC. That will get me closer to the correct CG.Unfortunately I have to correct this design on an ARF. One would think that CMP designers would design around Lipos over Nicad since technology has advanced to that level and Lipos are the battery of choice. CMP needs to get with the times.