Woodduck - Sorry about the late reply. After much bareshafting at the range, I have decided on a 74# spine. Paula sent the shafts out tapered to my length as I requested. I' m using 125 and 145 gr tips that I installed myself. Same for the nocks. They can do anything you want...its just a matter of how much $$$ you want to put towards a test pack. The shafts are unfinished and come from the " stump shooter" pile, but are clearly marked as to spine...and weight too I believe.