540 Degree Unispins

Ok guys, here’s the deal. Right now I can do a 360 unispin to seat
in front fairly consistently, and on my 16 inch I can do a 540 and a 450
to (to hop on wheel) consistently also. My problem is that on my 20" I
tend to get my right foot on the crank properly, my left foot is still
hanging in space. So, if anyone’s got any idea’s on things that would
help, specifically anyone that can actually do one, it would be great.
Another thing I would like some pointers on is a 270 from hop on
wheel to seat in front.

Thanks for the help that will almost definitely come soon.

Max A. Dingemans