This is my rig which I had laser cut. It's specifically made for the Lyman melting pot. The top disk is 3mm stainless to provide weight as it sits on the pot. and the lower two are 1.5mm stainless and is held together with a stainless bolt, nuts and washers.
I think I might buy a shorter thermocouple or I might have a hole cut in the lower disk for the thermocouple to protrude through. but otherwise I am happy.