So I sprained the crap out of my left knee 2 weeks ago. Still can't really plant and twist, so my backhand is terrible, however, I went out today hitting with the wife and I was crushing the forehands (that I could get to). I realized it was because I was really planting with all my weight on my right leg. It really allowed me to hit hard and through the ball. Interesting how an injury could help me focus on a fundemental on this shot.