I had a few personal emails to and fro with Joe. He was telling me that he was ill and the cost of medication was quite a problem for him. It is a shame I do not have the emails as they died with a previous computer.
One of the things he said was that going back to his time the propellors were a close fitting type sculptured to fit in the Kort nozzle. Experience was not so good though as the logs rarely seen in time would jam up the props and that put the towboat in dock.
They reverted to a round blade propellor as this would chew up the wood and spit it out.
On the web site is the building of Bootsie B and there is a photo of the props in the nozzles, 5 bladed and round shaped
Also on the model web site there is a diagram of all the lights and where they are.

Cheers
Roy

Roy,
I was looking for something else and came across these taken photos of my Korts and rudders about 10 - 11 years ago.
Lew

Added:
The rudders are actually about 3/4 inch wider. The boat suffered cavitation in reverse as the Korts/props were too close to the transom. So I added 3/4" to the transom as well as the rudders.