Very impressive stuff! It's made me revisit my TEEoPA engine with a view to sprucing it up a bit.
You stated, "Fuel cell cover has domed wick holder with no cylindrical extension, held in place by circular lock washer with inside "fingers" to act as clamp." I wonder if you have a picture of the fuel cell. My engine came without one, so I got a chromed faucet plug to fit the recess, but I don't know what goes under the plug.
Hope these views will help:
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I should add that the "dome" looks to be about the top 1/4 to 1/3 of a sphere, and certainly not a hemisphere. The base of the dome measures approx. .560 dia. while the lower stem measures about .340 dia. and the wick is about 3/16" dia. and an easy slide fit through the fitting.