All you need to change from .030 to to .023 is to change tips. And you need to buy some extra tips anyway. Remember that you must reverse polarity when changing from flux to gas. I have bought several welders from these guys. http://www.weldingsuppliesfromioc.c...re-welder-with-hose-and-regulator-500559 if you Google Hobart 140 you can find them cheaper. I have bought several welders from these guys.
http://www.zoro.com/?gclid=CLTZ4aX5lcoCFQiKaQodb1EIwQ&gclsrc=aw.ds

They are owned by WW Grainger. Ever so often I get an email from them when they have a one day sale on everything on their catalog. These sales are sometimes up to 30% off on everything. I wait for these sales to buy welders