I havnt tested it extensively but I use a bobcat with a 5 or 6 l oxycon and can make small pieces. need to test my set up again as I havnt for a while but when I checked last it was neutral. I mostly make hollow stuff rather than solid though. its probably a bit slow, I first used boro on a midrange running on tanked oxygen
hope that helps?
www.madelinebunyan.com to see my pieces.(note some were made on aforementioned midrange)