Tested today. Works. Took forever to get a good fire going. It would burn out of charcoal before getting hot enough. Had to keep adding more and getting hot again.

Finally got it all going. Melted about 20 cans into a ingot poured into the coffee can. Shown sitting on top of the can in photo.

Had to make crucible out of steel square tube and welded a bottom on it.

Running the compressor a lot to keep airflow going was costly I'm sure. but was nice to vary the airflow to change heat level.