Anyone know any good, free resources about building your own home gym components? I'm toying with building cable equipment right now to help out the people that work out with me. There are some cable exercises I'm interested in doing as well... I've figured out how to fix up a few things but it would be great if there were plans online to help out, or if any of you have experience building this kind of stuff. What I'd like to make: cable crossover, pulldown and some kind of rowing cable setup, maybe I can use the seat from an old bench or something to do seated rows. I'm sketching out some of my ideas and maybe I'll post them if I can find a scanner.