i'll describe to you my track if it helps...i'm about 1 or 1 1/2" from the fingers, and the first ring of flare is about 1/8" into the thumb...
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--- diameter of thumb..
\\\- track
i don't think i'm a full roller, b/c i've never tracked between the thumb and fingers, and the balls drilled fully roller that i've thrown have thumped the entire way down, but maybe.
my release has always been pretty shaky as far as, i don't stay behind it quite long enough. i've got plenty of rotation, my axis tilt is about 90*. is there any wrist device or anything i can try that might help me stay behind it longer, b/c a habbit that started when you were 6 needs a little bit of help to cure lol. lmk. thanks.