I have taken the weight down on a number of bows, some of my own and some for others. There is a limit of course and those limits vary for different bows. The spookiest one for me was when i ended up thinning the fiberglass to get all I could. With a minimum of tools and a little practice it really is not all that difficult, but you cannot turn a 90 pound bow into a 60 pound bow. It burned real nice though. I should have stripped off the glass reduced the core and then glued the glass back on. I think it is easier than cutting out a good shooting osage, at least for me anyway.