I have the 225mm diameter flywheel.
Today I rode over to the Indian Saloon, a restaurant and motorcycle museum about 50 miles from me that has motojumble every 2nd Sunday of the month.About 100 bikes meet up for a coffee and chat,all sorts of bikes,classics,customs and moderns.
I was pounced on before I could get my lid off with questions about the NF (I think most wondered where the other cylinder was!).a few people knew about the 'jambon couteau' and were disappointed when they saw my flywheel was covered.I have been thinking for a while getting one of those German covers (I have seen that two are available,which is the nicest one?) but for the moment I have cobbled up a piece of ally sheet to see how it looks.
Have a look at the Indian Saloon website,unusual to see a wild west saloon in France which has a Harley panhead and an Indian chief above the bar!
http://www.indian-saloon.fr/photos/