Still haven't found the air line for the ARB, so I stole the air line from the hp44 I have sitting around. It leaks from the air line where it goes into the compressor. I'm missing the little copper piece that goes inside the line for the ferule to clamp around, so Im guessing that is why it isnt sealing correctly. It locks, but the compressor kicks on every 5 seconds or so. Kind of annoying but it'll have to suffice for now.