Where is your upright hover in Idle up? 3/4 stick? 1/2 stick? I ask because in idle up at middle stick should be zero pitch. Upright hover should be above that and inverted should be below mid stick. Ive flown my cp inverted, flips, rolls, loops, And even some invert hover. Ive found that the pitch can be manipulated buy changing the links between the blade grips and the mixer. If you have a pitch gauge, check it there. I get +10 to -10 Im in the middle of a rebuild from a loss of control fron inverted hover. Oops the pice is this spring(winter)