When upright I fly pinch....I just realized that when flying circuits and fig 8's inverted, I'm thumbs.... uh, that's on the sim.
At the field, I don't fly much inverted, just a few passes now and then, not much sustained inverted.
My skills are rolls, loops, flips, I'd say some aerobatic, but not 3d yet.
Anyway, it feels like once established motion in inverted flight, I let it go and just guide it along it's path. The sticks together, sticks apart, is really a different coordination to get built as a reflex, but it's coming, so I'm just 'tapping' inputs and keeping it going.
When I'm upright, I gotta 'grip' the sticks and feel in 'control' to make it go where I want it.
anyway, i just looked down at my hands the other day and it surprised me....weird.....grip upright, thumbs inverted...maybe it'll change later.