After years and years away, I'm thinking of getting back into airbrushing. I'm thinking of getting an Iwata HP-C for small fine art stuff. But I'm also planning on getting a mini-gun (RG-3), mostly for doing some effects on theater sets (just spots, not covering a whole). So I'm one if the one-gallon California Air Tools compressor (2010A) is going to provide enough pressure for the RG-3, or if I need to go up to the 4620. I'll be working on smaller stuff in an apartment, so the smaller the better as far as space goes. Help?