Just got this from Leedy Guy.
He is an excellent gentleman to do business with.
Thanks Leedy Dude.
So, I have never seen one of these apart before.
No, it won't take a standard 13" or 12" head.
Head size might be 12 3/4" if it would actually work.
The "heads" are a mylar sheet held in the rim with a band of steel.
Sort of a compression fit.
I was surprised at the bearing edge.
Fun stuff.