Yep, microline is perfect for this, and it's what I used in my build. They are easily rebuildable if you get leaks - just pop the collar off and throw a new oring in.
You will want to preserve easy access to the fittings, so that you can maintain them and disconnect them for working on the gun.
It takes the same space as hardline, but is bendable and so can get through corners and holes in your construction easily.
Originally Posted by agentSmith
oldschool play is about sportsmanship and respect, oldschool gear is available on Ebay.