I like you had to find out by feel alone. Mine is perfect now. Too short, and I felt I had to use a lot of muscle tension to hold full draw for extended periods. Too long and I felt like I was spread out, my bow arm being uncomfortably straight and again muscle tension was involved.

Now, I settle in, and like the baby bears bed, it feels jusssst right. I can hold much steadier and am using my skeletal structure to my advantage, not my musculature. Back arm elbow is pointing straight down the arrow line, really really comfortable.

Find this zone, and you' ll know. An easy way to change things around is if your release (assuming you use one) allows adjustments to shorten and lengthen it. The scott mongoose I was using gave me a full inch to play with, in 1/2" increments, so I was able to test 3 different lengths without touching m bow. Good Luck.