Patrick, if you are still looking at this thread, I will try to help you.
My biggest issue with the 360 was actually the cut, funny enough. When I would cut, I always had a little too much tension, since I would cut in with a nice progressive edge. This would immediately pull me a bit off axis, and make the pass near impossible.
Once I started laying off that edge, and taking a nice, easy, poppy ollie-edge into the wake, I started hitting my spins 100% of the time, with or without grabs. I would reccomend that you lessen your cut just a tad (to relieve some line tension), and see if it doesnt help you stop getting pulled off-axis.