Hi all, I retired my old racquet and purchased a new racquet -- Wilson BLX K-Six One 95. Great racquet. I'm loving it. However, the time has come for me to actually start to develop more topspin. I already can hit fairly flat and hard, but topspin is difficult for me as I have an eastern grip. It is most comfortable for me. My question is about developing the "feel" for topspin. I saw a few videos of rallies with Dunlop Foam Speedballs. It seems like they might be fantastic to do hard wallwork with and practice heavy topspin strokes. Purely to develop the "feel" for the topspin stroke. Does anyone have experience with this? Can foam balls be effective for learning heavier topspin and getting a feel for the stroke?