I did a few days in the studio with Dennis Chambers, and it was unbelievable what he could do. Interestingly enough, he doesn't use charts or anything - very instinctual and goes from memory, which is not common in the hard core fusion world.The other drummer Carter Beauford, drummer for the Dave Matthews Band. I was channel surfing once, and a video of the live performance of either the song "Too Much" or "Drive In, Drive Out" or "Tripping Billies" (can't remember) was on. I could not believe what I witnessed and heard with him on his drum kit. This was no "taught himself how to play drums" kind of guy, he is a total PRO, with technique beyond anything I have ever heard.