I am new to tig welding and have recently bought a Miller Dynasty 200DX. I got the contractor kit with it that included a Diamond Back DB1725R torch. This is a 150amp air cooled torch. I will be using this welder in a hobby environment on mostly 1/8" or less mild steel, stainless and aluminum. I am using it on a 240-volt single phase circuit.
My question is, would it be worth while for me to get a gas lens kit for this torch? The people selling the kits make a lot of claims about saving gas and better gas coverage, etc. When I inquired at my local supplier they did not seem too hepped up about gas lenses. But, they sell gas. So is a gas lens better or is it just another doo dad that is really not necessary?
Also what would be the best tungsten to use for the above mentioned material? The torch came with red 2% thoriated. I have read a lot about the uses of the various electrodes but I am assuming that those recommendations may or may not apply to an inverter type machine such as mine. I know that with an inverter they do not suggest balling the tungsten for aluminum. Are there other differences?
Thanks in advance for any input.