The form problems are within your control. You don't have to move up so much in weight that you can't control the bow. You may not be able to shoot as many arrows, and in fact you can practice drawing at home without even shooting. I used heavier bows to allow me to be more comfortable with the existing bows that I had, and eventually was able to be comfortable with bows up to 100# ( up from 55-60). This being said, it is a perishable effect. If you stop shooting the heavier bows, you will have to work your way up again.