Honestly, it was the only portion of the E-book that I found useful.
That drill definitely has the highest impact in terms of waking up the brain, but not what I was looking for in this case. I am trying to make practical adjustments to the routine throwing progression during the time the team is together. Also take things out that might be harmful. I don't automatically buy into every hot concept discussed on DFP, but know that throwing mechanics are one of the main problems that higher level programs (in my area) identify when they see kids coming up from more recreational type leagues/teams. Since I fall into the latter category, I make an effort to stay ahead of the curve and produce a better athlete who might enjoy the game for a few years longer than she might have otherwise. This includes my own kids too, of course. For instance, the arm behind drill starting from the correct position, simulates the water drill beginning at the water-up position, using a ball instead. Thank you for your opinion on that drill (it's definitely useful information); I look forward to more help in rounding out this part of my program.