I have no idea how much time you have spent in ttw tennis tips forum … so just ignore this if already all over it.
- generally when talking about “windshield wiper fh” one is actually talking about ATP forehand, windshield wiper follow through just a result of arm roll with hand/wrist extension. About a million words on ATP FH in ttw tennis tips section … search at your own mental risk
- ATP fh came about because of the pace of pro tennis … a way to reduce size of backswing. Fed’s fh adapts to modern pace and heavy topspin better than a McEnroe. There is nothing about baseline pickleball that is forcing that ATP fh. Ironically I see the arm roll/hand extension elements in some of the pro low speed ups below the net. Watch Ben John hit one starting with paddle down … and then arm rolls which brings the hand and paddle around and up creating topspin.
- racquet path squarely through ball in tennis referred to as extension. In reality … at least on tennis stroke (can’t speak to ping pong bh pb volley) the racquet is always coming around. But if we swing in such a way we “feel like” you are reaching for the target … the thought is a few inches before contact, and a few inches after … perhaps racquet stays more square through moment of contact (ball on strings only milliseconds). I can vouch for it improving my tennis 2hbh …
whenever I felt like left arm/hand reached for target I hit more cleanly.