I have shortened a few glass and wood longbows including a Mosshorn, a Kaibab Chaparall, and a Kabekona River. (I wanted to make sure I could shoot short bows before spending the money to buy a Super Shrew.) I shortened them from starting lengths of 60-62" and took off 3-5 inches per bow. I picked up around 4-5 pounds per inch. An inch off of each end would give you an extra 8-9 pounds. If you take off more than a couple of inches your pounds go up more than that and I had to narrow the limbs some to bring the weight down to where I wanted when I shortened the bow 5 inches.