Any of you guys use the Stamp book and CD for warm-ups? I just got the book and CD the other day and have been trying to use it. I think I like it???.... not sure if it's doing what I think it's doing just yet. It feels like it's forcing me to push myself harder in the morning than I'm used to being pushed, to the point that it's almost uncomfortable (like I'm not warming up, but hurting myself). However, after doing my scales and Clarkes afterwards and then moving on to music I felt like I was playing a lot better.