For those looking to save every gram or if you have space limitations, I just installed these neat push lock connectors and 1/8 tube from MSC Industrial Supply. Shown for comparison is the ubiqitous 1/4 tube. The tube is a dime per foot and the fittings only a couple of bucks each. The link to the fitting is here: They are available in a wide variety of sizes and the tubing is too. I've never dealt with MSC before but they are fantastic. I'll be using them a bunch in the future.