Have been playing with the EXO3 Black for a while but feel that it might be a touch too heavy for my taste. At net, I notice distinct fatigue after a while. I am playing doubles nearly all the time and have reasonable technique, perhaps about 4.0 standard. I am 45 and have a bit of a history of unspecific elbow (golfers) and shoulder problems. Nothing that keeps me from playing, but annoying. I had the Prince strung with a Softflex, their house multi, so don't think I can do much with the strings. Any ideas what to try next? Having said that - I have gone through APDC and a Radical - I seem to be a serial doubter of racquets. Perhaps it's time to dig in and see this through for a while?