Thanks guys for the responses!!................... this is a great forum,

I'll take the advice and move the battery and rx back as far as reasonably possible to balance her. I'll causiously fly her and see how she does. I have a Giles and an Extra 300s for aerobatic fun flying. I only fly the P-51 for high speed passes and an occasional roll or loop so if she doesn't have a very good climb rate it will be OK. But if it becomes a brick I'll make some major weight saving changes.
BTW, I switched to the 4S for the scale-like sound, not so much to improve the power or performance.


Thanks again
~J