ORIGINAL: lnewqban
chemie:
I would leave the engine alone, follow ChuckW's idea, wrapping the battery with foam as much as possible, and test flight.
If still tail heavy, just add led to the tail.
Overpowered models are seldom light anyway.
Regards!
If it's tail heavy, add more lead?[sm=50_50.gif]
I'm sure that was just a typo, but anyway chemie I wedged my battery pack in the back of my extra with a bug chunk of seat cushion foam rubberbanded around it. It works fine. Give it a good shaking to see if it will hold, you don't want it coming loose and unplugging on a rough landing.[sm=thumbup.gif]