Definately thinking about building my own, first because I think it would be a great learning experience, second, I don't want to spend a ton on something I may decide I don't like and third....because I think it will annoy my wife.

And thanks for the advice for saving my knees. After 10 years as a baseball catcher and 2 surgeries, I have to think about my knees a lot. I need them to chase my kids around.