Is the draw length right, just the weight can't go higher? If so, twist BOTH the string and cables. This will raise the draw weight while keeping the draw length the same. It takes
a bunch of trial and error to get it right, especially on a two-cam to keep the cams synched, but its actually pretty easy. I did this with my wife's Thunderbolt with Maxi-HL cams that we used the cam to adjust down the length 1/2 inch. Problem was we then maxed out on poundage around 42 on 50lb limbs (with cams set to "normal" slots it maxed at 52). I marked the cams with a gel pen, twisted up both cables, twisted up the string then played with it to re-align the cams and poof, maxed it out at 47 which was perfect for her.

--Bob