I have an older (say 12 years) Hoyt Supreme that I have used for years. I am getting older, but the bow isn't. I'm not as strong as I was, but the bow still is....I was wondering, is it possible to change the wheels for ones with greater letoff? These are only about 50%. Can cams be used on this bow, or do I have to go to a newer model? I really like this old girl.