OK so my cruiser has a leak in the rear a/c line over the rear axle. The PO put a compression fitting on it with a brake line. Regular brake line is no good with the moisture going though it. My thought was to use copper nickel brake line. Any thoughts on this? If it is DOT approved for hydraulic brakes on trucks I would think it would hold. I have researched airsept compression fittings and block offs for the rear air. I have a section about 20" to replace. I'm sure the screw will break of if I try to remove it from the rear condenser and replace with a factory line.