I bought a 50’ Simpson 5/16” hose when I got my MTM sprayer. The MTM kit I got came with all stainless adapters including a swivel QD. It has been much better at not kinking and winding up when moving around the car since the gun can freely swivel and the hose doesn’t try to move around with it. Not perfect, but much better than the direct screw-on hose attachment.