Never had a problem cutting even up to 1/2". But I truely didnt use it to cut very much. Mainly used it for gas welding.
Bought mine used off a guy on a Hotrod forum, it ended up being setup wrong at somepoint and had the seals blown out. Henrod warrantied the repairs even though I wasnt the original purchaser. Not sure what the Cobra deal is, if they bought out Henrob or its a knockoff.