Hey, I just bought a new boy for my girlfreind. its a 05 Hoyt Rintec with 18-26 draw length and 40-50 pounds. It just got delivered last night and the draw length is set at 26 which is too long for her. I know she can pull back 40 pounds with ease because she can pull my old bows back fairly easy. When she tried to pull this new bow back she struggled. is this because the draw length is to long? If I change the draw length for her (18-20 inch range) she should have an easier time right?