Anyone here have a powerball or any of the cheap knockoff copy cat hand gyros? I have a Therabee and a Theragrip, both from my Wife's PT Practice, which only hit a max speed of about 8000RPM, which while fun, is not really challenging me anymore. I guess I'm asking if the $38.00 plus shipping to get the Techno on e-Bay is worth my money, or if I should go with a less expensive - say 13,000RPM - ball instead. The Techno is capable of reaching speeds of over 15,000RPM and has a digital speedometer that flashes around the edge of the ball like those LED bar signs. There are other Powerball models that are just as fast, and have LCD screens on the top for a speedometer, or no speedometer at all, and of course cost less than the Techno. I guess I'm just looking for a bit of pushing in the direction I already see myself going in... a little "shove" if you will. Reviews on these Powerballs and other hand gyro products would be cool too... of course, every company says there's is the best and fastest, but only Powerball has actually proved anything with a Guiness Record.