Here is some pics of my first drawing (and only drawing so far). I went with 1/2" die just for convenience and can easily be changed. Note the holes for the probes are .25" deep. The 4 holes on the outside sides are meant to be tapped for screws to keep the cartridges tight. I was planning on using 1" long and 1/4" wide 100watt 120V cartridges available at mcmaster.
What other materials would you suggest we look at?
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