Well it's a cobble job of scrap to enable multiple TC's to read the melt at different depths at the same time. Only used it once so far but indications are there's not much difference from bottom to top of the melt. Next session I'll leave the 2nd TC in place to see how long it takes the heat to migrate upwards from a cold start. Might also enlighten me on temperature drop even when adding a "hot" ingot. It looked like a 340°F ingot added to 6-7 lbs of hot melt dropped it about 30° C. Suspected it might be quite a bit and it's why I use a feeder pot which doesn't drop the temp.