Ok, I have been tuning my Dryad ACS RC (48 on a 19") long limbs, have them on my Spig BB riser (thanks Sgrella and Coodster). BH is set at 8 1/2, poundage on fingers is 47# at my 30.5" DL. I have a ZT rest on it, and a beiter plunger. Started out with full length 520 ACE's and 100 gr tips (I think), way too weak. Went to my 430's, full length with 100 up front and Wave vanes. Tuned ok, BS to 25 yards fine. Groups were good out to 40ish. Not being satisfied I had it at its best, went to my 370's, which I had for my finger compound, fletched them with wave vanes, 100 gr's up front, and tuned great. These are also full length and shot better groups out to 50. These seem to me as they should be way too stiff, but the BS doesn't lie. Oh, only a BB weight in the stab hole also, no longbar or stab. I really am scratching my head as to why I need such a stiff shaft, but it works. WIth my SF Elite plus limbs, same draw weight I tune perfect with the 430's and the 370's are too stiff. I can get them borderline tuned but not where I want.