Charlie, while I don't have a bow for you, I can offer you some exercises to build up your shooting form. I use dumbbells to boost my muscle performance for shooting. In your case, for a 30#-35# range, I would start with 7# dumbbells, working up to 15# dumbbells. Grab the dumbbells, and stand in your shooting stance. Then Push and Pull with just as you would your bow when drawing. These motions mimic what you would do. To balance the workout, I also reverse directions. I alternate, left and right hand shooting motions. For a righty shooter, I push with my left and pull with my right, for a lefty, it is the opposite. I do both, to balance, just my OCD I guess. Start out with a 7 pounder in each hande, do 4 sets of 8-10 reps each day. Then the following week, increase to 10 pounders, and so on. To strengthen your upper back, also use dumbbells. Do reverse flyes. Normal flyes are done on a weight bench, with a dumbbells in each hand, and you have your arms slightly bent, and you "hug a tree". these are for your chest. Reverse flyes, will work your upper back. Pick up the dumbbells, then crouch down a bit, bend your knees, and lean forward. Know you hug, then open up, bringing your elbows towards your back. I hope this helps you out. Good luck, and keep plugging away at it.