btw, love what you guys are doing, especially you nate, awesome stuff. Im very interested in sub zero cooling, and ive read the entire "get it colder I," one question i have is what tubing do you use for sub zero temps? Its been along time since i read that thread and well, I cant seem to find it anywere (the link halo_003 gives just redirects me to the forum again... not the thread). any help in this area would be awesome, thanks in advance!