I thought I would share my findings on twisting the cables on the new binary cam, take it or leave it.

I had read a few times that let-off can be changed by twisting the cables. One message board post said to put 3 twists in the top cable and take 3 twists out of the bottom cable and the let-off will go from 65% to 80%. My 27 1/2" Allegiance was right on the DL but the post was about 3/4 out in the slot and the let-off was at 69% as received. I wanted to shoot 80% let-off so I moved the post to the end of the slot and got 80% but now the DL was accurately measured on a jig at 27 3/4". I was glad to hear you could change the let-off by twisting the cables because I wanted to put the post back to the 27 1/2" location and then twist the cables to get back to 80% let-off.

Not so fast. To make a long story short I tried every combination of twisting the cables. I twisted both cables, removed twists from both, twisted the top while removing from the bottom and vice versa. I tried adding and subtracting twists from the string along with the cables as well. I never did more than 3 twists to stay within the recommendation from BowTech. My results revealed that the let-off did change on some combinations but SO DID THE DRAW LENGTH! For example, putting 2 twists in the top and removing 2 from the bottom cable took the let-off from 69% to 77% but the draw length also increased from 27 1/2" to 27 3/4". Twisting the cables had the same net effect as moving the draw stop.

I have a feeling that the people who say they increased the let-off by twisting the cables also increased their draw length slightly. I took all my measurements in a jig that draws the bow back very slowly while monitoring the poundage so a change of 1/8" can be seen easily. Then again, maybe other people have been successful changing the let-off while maintaining the DL but my bow did not yield the same results.

Since I was not able to get 80% let-off at 27 1/2" or less I decided to swap out the cams to 27" because 27 3/4" is just too long for me (5'-7" tall). I am not dead set on 80% but the binary cam bows feel so much better and have the best valley when the post is at the end of the slot. I have since been shooting with the draw stop near the middle of the slot and it doesn't do the bow justice.