I did indeed
This set uses a tapped focus coil. A wirewound pot is shunted between the tap and one leg.
That brings up another issue. The focus control is only responsive for about 25% of it's travel. I suspect there is a break inside. I'll pop it open and attempt a repair. If I can't, I might have a spare from a scrapped Admiral chassis.
The tricky part is remembering where my box of salvaged controls is
I need to get serious about sorting and organizing since I moved almost a year ago!