Hi guys,

If your CG is not back far enough, or you dont have enough elevator throw it wont flat spin good. I took off the 1" servo arms that the hardware kit comes with for the elevators and put 1.25" arms on, made a difference. Mine does nice upright and inverted flat spins.

Harriers are something you have to learn, be on the ailerons to keep the wings level and drive it around with the rudder and throttle. It takes practice just like everything else.

The GT80 will never have the power a zdz80 or DA100 has, dont kid yourself on that one..

I pulled my zdz80 out and put my DA100 in the sukhoi. POWER, love it, hardly could tell any difference in the way it flies, but it has tons O power. perfect match, only problem with sukhoi is 28" prop does not clear ground very well. Going to put on a NX27x10 to try to help it, but probably going to find a 3 blade as It wont hurt me to loose some thrust with the 3 blader. Plus will look scale.

Lastly, my cg is 2" behind the wing tube as well.

Good luck! If you have any questions ask.