Hi Cap_n
Isn't spring time in DC terrific? At my son's try-outs this week, one day was spent just shoveling snow off the field.
Here is a link to a Free item on the NPA sight that discusses the quest for the perfect delivery, and more importantly, gives a graphical representation of the NPA Pitching Biomechanics.
http://www.nationalpitching.net/sampleart.asp?
If this wets your appetite, the next best thing to do is to spend the $25 and 2-3 hours required to go through the Online Clinic.
http://www.nationalpitching.net/onlineclinic.asp?
In my opinion, to try to clearly communicate the multi-dimensional aspects of a Pitching philosophy or mechanical model in a one-dimensional environment like a web post is probably not going to be very effective; and highly likely to become a train-wreck of a thread (like some other threads in this forum).
If you really enjoy studying the art of Pitching ... which I believe you do from our previous exchanges ... check out the online course. Or maybe we can catch a game together some time.