I've been trying to find the Low letoff modules for my Hoyt since January with no luck. It's a 2004(5) Protek with xt3000 limbs. I'm shooting the A cam and 1/2 with the HL mod on it. I shoot 27.5 in dl. If I can't get these mods anywhere (even Hoyt says they don't have them), what cam can I switch to to get 65% letoff, and how would I figure string and cable lengths?