RE: 3D Hell Raiser
Got some flying in today. Looks like a 3.5" cg will give you pitch neutral flight. Zero elevator trim for level flight upright or inverted. I was flying in my cul-de-sac so I didn't get to try anything more aggressive. Can't wait to try hovers and harriers at this new cg!
BTW, I can get this cg just by sliding my TP 1350 pack all the way to the rear of the nose compartment. It still lies horizontal and I didn't need to pass it through any bulkheads. Looks like Mike Glass really did his homework on this design.
Clark