Was just reading about the O rings in the airbrushes. Over several years I have learned a few things. And here is what I have found. The badger, Blue Point, and Thayer Chandler "Vega" all have air valves with rubber seals that can be unscrewed before soaking the airbrush in lacquer thinner if thats the case. The Badger, Blue point, and Vega take the same fitting. Dont remove the core, remove the fitting with plyers by turning the teeth on the shaft next to where you screw the hose on.(if this makes any sense) The only other O ring I have found in these is the one at the nozzle on the Vega. I might add that the Badgers, and Blue Points (identical airbrushes, different companys) clog at the tip and have to be cleaned often. The cheaper Vega seemed to be a better airbrush. The Pasche you have to remove the core. Iwata airbrushes, The one I use for the models has a Teflon seal and no worries with lacquer thinner, model, or automotive paints. That was a big selling point for me. This is something fairly new. Just remember never use any bleach around these, it attacks brass like crazy.