I have thought about getting a bottle for it. I had it set up once but the regulator I have leaked somewhere and my bottle was empty in a few days. I said screw it after that. (There is also a 10lb spool of flux that needs burning) If I can find a cheap bottle I may set it back up.
Also I am about to pull out my 231 today and tear it apart to see what needs to be replaced. Reading somewhere someone said you need retaining ring pliers? Like this:
Are they really necessary? I have spent the last 10 minutes trying to find a set and they cost around $50, then most places I check say there is no difference between "retaining ring" pliers and "snap ring" pliers.