Just one more question if you donīt mind...
What kind of retracts were you using on that 80in -9?
As far as I can see on the -3 plan the retract angle is somewhere around 85°.
BTW. I think I will build a small simple version of the -3 to test the flight characteristics before I start the 1:5 scale version. I have done the same with a Hawker Typhoon Iīm also making plans for. It also has a wierd setup with the wing and engine at 0° and the tailplane at -0.5°. Flew quite well though...