Mike,

If memory serves, the CG on the original kit was about 1 1/4" behind the LE. Top Flite was notified about the incorrect CG...about two years ago. Apparently they did not see fit to correct it. You have a good combination there. I would suggest trying a 9x4 or 10x4 prop to slow lap times to about 5 seconds.

Good luck with it.

George