I'd agree with JK - I've always found that my limbs (70") are always more stable when wound up as little as possible. If I ever had to go past mid point on the riser I'd consider getting heavier limbs. But I've had plenty of people disagree
I had a set of WINNEX that worked out light at full-draw (hey that's what you get when you buy off ebay!) when wound up all the way they still gave me less weight than my G3 but were harder to shoot. When wound down they shot very nicely - just not quick enough
YMMV
Stretch