I havnt been on here for awhile since I sold my Cadillac. Since then I've picked up a 95 lincoln Mark VIII that came with factory air ride. I snatched all the factory management stuff out and modified my bags to accept NPT fittings. I put in viair 444 5 gal tank 1/4" line and paddles for each corner. The shit is cool but slow. I bought some 3/4" Danz valves which are huge but I got them at smoker prices. I also bought some 9 wire, 4 three prong switches and 2 six prong switches. I'm gonna run 1/2" fittings and line. This is my daily so I wanted to redo the management but upgrade from plastic to hydraulic hose for dependability. As far as the hose is concerned I'm looking for 1/2" inside diameter. I'm just concerned on the type of hose ends to get? Can I get away with npt ends or do I need the hydraulic style ends? The bags on the car are factory ford units so I'm not trying to run crazy pressure thru them. Right now it's set at 180 max and I might bump up the pressure to 200-250 in the future.