Nice attempts, unfortunately you have the trick slightly wrong. You need to pitch up on the stick like a front flip motion after the half roll to inverted to get into the flying backward position. You are pitching down on the stick like a backflip motion which basically is like a quick split-s then leaning back.
Ah cripes! Didn’t realize. I did think maybe there was something strangely odd in my technique there but I guess I didn’t think about it enough. Thanks for the feedback Dan. Onwards and upwards to trippy spins!