Debating machine selection. Ext for for sure to get digital and wave forms. But my dilema, go 325 never come up short, or, since I already have helium go 255 and allow gas to make up for the occasional short times. I know I'll have to do few extra calcs for helium versus argon, but my thinking is new machine never has same settings as old, so I'll be re tuning settings anyway. Hope this makes sense!

Barry