Finally pulled the trigger and ordered the Maxline kit from Rapidair ordered from Summit Racing. I went back and forth between Copper, Black pipe and this kit, each have their own benefits but what won it over for me is the fact that I can bend this stuff around corners reducing a lot of restrictions. I really had to scratch my head after calling Rapidair?? You can request a custom kit from them so I call them and get a quote of $1,500, I go to Summits site and I can buy 2 100' kits for $300.. add a couple more fittings and I may have $400 in it. Here's what you get in a 100' 3/4" kit. Dog not included Seeing these made me feel good about my decision, nice barbs on both the fitting and compression ring... it isn't coming off! Here's my biggest disappointment that I'll fix, I love the wall mounts for your outlets but they have a 3/8" NPT on one end for a drain so no option to pass through with the 3/4" piping when running a series of outlets at the work bench. I'll drill and tap them so it's a simple in and out saving $18 per T. My biggest concern was neatness, if this stuff is to flexible it will look like spaghetti on the wall, it's not. I'd compare bending this stuff to bending 1/2" copper, stiffer than PVC for sure. I'll make a set of rolls on the lathe to pull it through rather than buying theirs so it's nice and purdy when it goes up.