Hey everyone, I recently switched to polys at the behest of my pro, he recommended Dunlop Black Widows to use on my Dunlop 300 4D because he said it would help to smooth out my game and it was basically an experiment. Whatever, it didn't work, he admitted it and the strings have actually made my game worse especially considering they're strung at 63 lbs and i can't get halfway through a match without my arm becoming noticeably stiff and painful. The strings did help with my serve to be honest. I mostly play doubles, but I do play plenty of singles. I prefer baseline hitting but come to the net fairly often. classic forehand and two handed backhand. My first serve is a hybrid serve with more forward lean and my second serve is a spin serve. I have 2 Dunlop 300 4D so I guess I could play around stringing. Any recommendations are welcome.