I actually have a mig welder. But no gas. The gas would cost more than the piece of metal.
How much torque does the connection need to transfer to the top plate? Is the top plate going to be heavy? Is there any reason that something like this wouldn't work?
https://www.ebay.co.uk/itm/254647352516?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=S_pdKU3uRna&sssrc=2349624&ssuid=2oiWpP7gSxu&var=&widget_ver=artemis&media=COPY
@Light_EDDed started
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I actually have a mig welder. But no gas. The gas would cost more than the piece of metal.