This week, I have been playing with my retired racquets and was shocked at how good they played. I have several Puma Boris Becker Super's that I tried out and let my hitting partner play with. We both loved the smooth feel and control. The plow through was great. I weighed the racquets after playing and they were 13 oz. each; no racquets come so heavy these days. Does anyone know if these are different from the Estusa Boris Becker. My racquets say GRAPHITE 50/50 FIBERGLAS on top of the frame. I have heard that Becker's Estusa's were 80/20 graphite to fiberglass.