Crushers,

     I bought a Pitcher's Power Drive a couple of years ago and used it with a few pitchers before deciding I didn't like it.  In my opinion, it teaches a pitcher to start moving forward too late in his delivery.  It works best when the pitcher waits to move forward until he reaches maximum leg lift.  I believe a pitcher should start moving forward as soon as he picks his leg up.  I experimented with using the Power Drive with a block under the back side to set it on a permanent incline and that was useful in some cases.  But, I thought the device taught too much of an up-down-out-balance point-style delivery when the pitcher waited to click it forward until after he reached max leg lift (the videos promoting the Power Drive show pitchers lifting their leg straight up without moving forward, then triggering the device forward after maximum lift).  Brent's article that he mentions above is very good on the subject.  Bottom line:  I've used the device and don't recommend it.   

It's a pleasure to join the forum, Brent.  I was just watching your analysis of John's son, Colten.  For those of you who are reading some of these topics, you seriously need to watch as many of Brent's analyses as possible.  They are extremely educational.  Brent does the best job I've ever seen of analysing lower half pitching mechanics and the effect they have on arm speed and ball velocity.  It's one thing to say that long explosive strides equal velocity, but Brent's explanation of how triple extension affects the hips and the separation between hips and shoulders really explains it in a way that can help pitchers implement high velocity mechanics.  This forum is a treasure of information.  I just recently purchased the 3X program and joined the forum, and I've already gained fresh insights on things I've been teaching for years.