I actually stopped using the 100P (2019), and went back to a blade 16x19. The 100P felt a little hollow, had a little buzzing sound when bouncing the ball and I started to have slight arm soreness (not quite golfer elbow, but almost). I string decently low at 20-22kg with Solinco Outlast, Tier One BK, Hyper-G or Prince XP. It really was a shame, because I think the 100P is a close to perfect frame, playability-wise. My soreness might have come from the frame, but I think my technique was also at fault. I worked a lot on my mechanics with the Blade, and never sold my 100Ps, so took them out recently to see how they felt. I do prefer my Blades now. They just feel more solid and I feel more precise in what I want to achieve with the ball. Only downside is the grip; the 100P had a perfect grip, felt so right in hand. The Blade is just ok, but everything else is addicting