Not too long ago I went from almost no tilt to (as much as) 50 degrees or so. I've no idea if what I did is the "right" way, but I changed my starting hand position. I cannot get my hand in that position without a ball in it. My thumb is at about 4 o'clock and my fingers at about 9 or 10. I maintain that thru the release, ie, I get a TON of side roll. I come from behind the ball off in a path nearly parallel with the ground. I can now vary my track from almost a full roller with my old up the back release to a near spinner (about a 4" diameter or less track).
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"All I want to do is get my check and get drunk."