I have a hoyt katera xl 27" draw with Z3 cams. Hoyts tune chart says it's supposed to be 35" A2A with 7 1/8 BH at 27 " 70lbs. When I get the A2A down to 35" the BH is 7 1/4. And I can only get the bow to make 66lbs. Could the tune chart be wrong? This is getting to be very frustrating. Any ideas? Thanks everyone.