I’ve been watching and following the advice of Dr. Ashby on building and tuning high and ultra high FOC arrows. One of the difficulties for me is that I have a long draw length (30.5″) that prevents me from doing much shaft cutting to stiffen spine so I’m really left with testing various spined arrows with different tip weights (not the best way to tune according to Ashby). I shoot a 64″ 45lb Bear Patriot (at full draw measures 49lbs) and have experimented with Goldtip 7595’s, 5575’s and 3555’s. I’ve found the 5575’s with 250-300 grain tips gives good performance. My boadheads have ended up weighing 263-278 grains. I would like tune my arrows even more. The length of the uncut Goldtip seems to fit my draw length well but am wondering if there are longer carbon arrows (32-34″) in this 400 spine range out there or arrows manufactured with spines that fall between 400 and 500 range, say a 420, 450, 475 spine. Interested to know what you have to say.