Greetings: New to this forum and was leafing through and saw the topic on brake drum forges - Here's one I did using a Semi truck brake drum - I inserted a disk brake which had a piston sleeve welded to it to raise up the fire pot put wheels and held it down with an old flywheel - it works pretty well but it took some trial and error to get things to go the way I wanted.
I got all this material from my son who is a diesel mechanic - It was fun to build and I use it daily