I posted awhile back a question about what I can do in addition to practice to increase my finger speed, and got some mixed responses. Some said the Gripmaster was a sure bet, but others told me that they don't do anything, and could cause carpel tunnel. One person mentioned that Chinese Balls are good, while others said it was just a stupid idea. Being an open minded person, I decided to give them both a whirl. I bought a medium tension Gripmaster, but instead of just continuosly squeezing and releasing, I would press down and just hold for awhile, cutting down on the repetitive moments that could cause carpel tunnel. I targeted a lot on my left hand pinky and ring finger, being the obvious weaker of the 5. Also I would switch between both hands just holding down all 4 for about 20 seconds each. I also bought a pair of chinese balls on ebay for $5. I didn't use those as much as the Gripmaster, but I would do that like when I was reading, or watching tv or whatever. I noticed the first day that the chinese balls definately released some tension I had in my hands and wrists, which is good because I work on a computer all day. I did this for about 2 weeks, and then took a break from all of that for 2 days before my next gig. Well I must say I noticed a huge improvement. I was able to move around the fretboard faster and more accurately, which resulted in more confident and overall better playing. I noticed that my movements were also more agile and smooth, very flowy. I attribute that more to the Chinese balls than the gripmaster. So for anyone who has thought of trying it and for all who are skeptical, I highly reccomend you give it a whirl, you just might be surprised. PS - Of course I reccomend all this IN CONJUNCTION with practice, for which there is no substitute.