I have used nitrogen at the suppliers only. Clean compressor tank, trap and hose make big difference. Keep stuff drained. Most times cuts are ground before any welding ( same as gouged ) anyway and engineers can be yes idiots ( especially drawing prints ). My first ( 350 ) lasted 9 years and current ( 600 ) both Hypertherm. Was told that motherboard was bad on old one but wish I had it back for sheet. Don't get me wrong, the 600 is great but the consumables for the smaller torch were about 1/2 price comparitively. The 600 has given me power of course. One trade for another.
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" It ain't real if it ain't forged "
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