I made an angle ingot mold and it is little on the small side and heavy. Made from the only angle scrap I could find 1/4” x 2” x2” stainless. So continuing with the porosity discussion I cut the extra casting top to bottom. Uniform porosity top to bottom! In Kelly mentioning my furnaces design I realized I had a stainless bowl that fits the pot opening almost perfectly! It actually sits on top of crucible blocking out gases from the flame, AND I use it to preheat the metal going in to drive off moisture and gain some additional BTUs that are otherwise wasted. Melting time seems shorter too.