Thanks Darren, very helpful info.I believe the 135te is supplied with a reg to run on the disposable bottles, but i do know they do a conversion to run on the industrial one, and weldequip does sell them. It is better to run on argon/co2 mix, much cleaner than CO2 in terms of less splatter and the arc is more stable. if your doing carbody stuff you want argoshield light or similar 5%co2, 2% O2 and the rest is argon, but if you can get argon80% CO2 20% cheap enough that will be fine