TIG welding Autobody

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I’ve got an old Lincoln 300/300 welder that I use for TIG.   I usually use a foot controller, but with welding on a racecar, it is not always practical so I use the wire feed welder a lot.   The other day I tried a push button on the TIG torch and it worked Ok, but couldn’t get my amperage right.  On one range, I would turn the dial on the welder all the way to max and it wasn’t enough heat.  So, I switched the heat selector switch to the next level and then I rotated the fine adjustment all the way to minimum and then it was too hot, so I’m not able to fine tune my welding with a button like I can with the foot pedal.  Anybody have any ideas?  Is there such a thing as a variable knob that can be on the torch?  By the way, I was trying to butt welding maybe 22(?) Gauge sheetmetal.ThanksMark
Reply:Originally Posted by mark460  Is there such a thing as a variable knob that can be on the torch?  Mark