I'm finally tired of paying sporting goods store employees $30 to take a week to string my rackets. I've pretty much decided on getting a new Gamma stringer from ATS, but stringing technology is pretty new to me and I'm wondering if a few of you veterans could help me out on a couple points: I think I want to get one of the new 'X' series machines, are they new? What are their improvements (if any) over the Progression series? The prices between the two series seem comparable, except ATS has free shipping on the X series. I don't want to spend the money on an electric, so it's between crank vs dropweight. What advantages does one system have over another? I'll be stringing at most 1 racket/week. Thanks for any help/input.