Just changed gas over to hobyweld 5 rent free bottle and the transformation in my welding is amazing. If I had realised the difference from co2 I would have done it years ago. The time I would have saved grinding down bulbous welds would have paid for the bottle. If your thinking of changing from co2 without a doubt do it. This is co2 on 0.8mm plate And this is hobyweld Much nicer to use, no splatter and a nice sizzle.