Bill,
Been reading your posts, I'm surprised that your turbine bobcat is tail heavy. I sheeted mine, wings and stab, and it was still nose heavy. I ended up puting both the radio/servo battery and ecu batteries as far back as I could to get ut to balance at 10.3". After about 1.5oz added to the tail.
Flys fine just had to decrease the ailerons and add a bunch of expo to smooth it out.
What Size turbine are you using?

Hapyjac

www.SouthFloridaJetTogether.com