I strung up my racquet with my new Klippermate at 54 lbs and played last night. Tonight I downloaded racquettune and checked it out... it came out at 37 lbs! I'm reasonably sure I have the info entered right in the app; I'm new at stringing, and the only thing I can think of is that I might have lost a lot of tension when I was tying the knots (even though I actually set the machine 5 lbs higher with the final strings). The only problem is that my Volkl PB 8, which was strung by TW at 52 lbs a couple of months ago, and which I've only played with a few hours, is also coming out in the 30s. Seems kind of weird. I guess I'll re-string the racquet, but if anyone has any input, it's appreciated.