So now that I have an Iwata SAR instead of the Badger, I need to get the iwata hose for it and most likely the iwata pistol grip filter. BUT I don't think the hose will hook up with the compressor and I don't know what fittings to use! Plus when I get the fittings on the compressor, can I switch back to the old hose in the picture?
Also what is this tool?

And will this work in cleaning the airbrush and acrylics?
sparknotes:
- don't know what fittings to use with an iwata hose and pictured compressor.
- will I be able to switch back to old hose and take off the new fitting?
- what is that tool for and will the cleaner work for the airbrush?