Avenge-X has installed male quick disconnect so GX CS4's female quick-disconnect should attach easily. Gold filter between compressor and gun, assuming gold filter has male/female quick disconnects, you'll need quick-disconnect-equipped fill hose from gold filter exit to Avenge-X. Also, bottle of Ballistol, Patch-Worm Cleaning kit and heavy-weight silicone oil are considered "essentials" by many. Steve, at AEAC, has a great YT "how-to" video on Ballistol and Patch-Worm cleaning. Small bottle of heavyweight silicone oil, same as used for treadmill exercise machines, is lubricant that won't hurt "O" rings, can find searching eBay or Amazon for treadmill lubricants. Set of metric Allen keys is also very helpful. WM