No death wish and I'm not a thrill seeker.
I took a page out of your sig line, Adapt, Improvise -- Overcome!
I hit upon the mag chuck idea as a bit of a work around. I cut splitters for tablesaws out of 11, 12 and 13 gage crs sheet. I was doing all this freehand on the bandsaw. Time consuming and not very accurate. I had mixed results using hold downs on the sheets. They just wouldn't pull flat without drilling holes in the waste in the center somewhere. I make about 40 different patterns of these and this was a lot of extra work.
The mag chuck pulls the sheets absolutely flat and holds them very well. Now this little vise is just sitting on the chuck, but it is attached with 4 pins to the 6" x 12" by 1/8" steel sheet and by 2 pins and a bolt on the 1/4" by 1' angle iron. I don't think my mill is capable of moving this vise once it's locked down. I can't move it by hand nor by using a mallet.
I was going to put a quick lock mechanism on this side under the vise and may still do that, but that will just add a little more security.
This magnet pulls with 270 pounds per square inch. 19,440 pounds holding power. That works. It also added some nice mass to the table. Really produces smooth cuts.
I am working on a plasma cutter as well, but it's on hold till spring, so this magnet will fill in until I get that done.