I was day dreaming a bit during a meeting to day about tennis and wondered why or how a guy migrates to a "heavy" frame. I remember when I lived at lakeridge tennis club in Reno,NV there was a kid I played all the time he used light Head Vilas rackets 12.5 unstrung. this kid hit so much pace & topspin and when he needed some new frames he bought three dunlop maxply forts in the medium weight or range. I always played lt.-med. 13 oz. and I asked him why the jump in weight and he told me the vilas frames began to feel like he was swinging a feather. of course this is when wood still was the desired material for a frame.