I have been lurking on the board for a year or so and finally decided to "jump" in...

I am currently the jumps coach at a small HS in SE Minnesota (DistanceJumper is one of my vaulters). I am looking at implementing the 'free take-off' with one of my vaulters this coming season and would like to ask the first of what I am sure will be many questions.
Considering the fragile nature of the HS vaulter in terms of technique, training and routine, what methods of implementation (successes and not so successful) did you try with your vaulters who were just beginning with the 'free take-off' technique?
I have been studying this method with the BTB book and the expertise on this site and have a good idea of what I would like to do in the beginnings of the season, but would appreciate any feedback from those that have gone before.
Thanks in advance...