Thanks for sharing RC. I've always shot GT 3555's cut to 29" out of longbows ranging from 46-52# at my 28" draw. However, I recently tried some GT 1535's out of some longbows from 47-50#. D-shape longbows with shelves nowhere near center. What a wonderful difference it made for me.
Specifically, right now I'm shooting a Bama Hunter that is 64" and 50@28. Using 29" GT 1535 with 200 up front, for a total arrow weight of 475 grains (9.5 gpp) and getting perfect flight. If I want to use GT 3555's with this bow, the arrows are 29" with 300 up front for a total of 590 grains (11.8 gpp). Both setups work great.