Hey all, anyone know of a spine calculator program that works on macs? I am looking into some new arrows for a new bow and so far the programs I've seen like TAP only run on windows. Or anyone have one and mind running some numbers through for me? Looking to outfit some 28.5 inch arrows, 125 gr tip for a 60 lb @ 28 in draw realm X on comfort setting. Weight between 400-450. Thanks!!