Hello, long time lurker... I finally signed up

I'm wondering if anyone has thoughts on my sons swing. Here are a few clips, some are at the Baseball Performance Training Center and some are at his hitting T setup in the garage:

http://www.youtube.com/watch?v=G6Weq1zm544&sns=em

http://www.youtube.com/watch?v=FVnQg8gKA0I&sns=em

http://www.youtube.com/watch?v=2pcdSKL_s54&sns=em

http://www.youtube.com/watch?v=nJdERWwJ8l0&sns=em

Thanks for any feedback!