| Now that's very interesting!!! I am currently struggling with the couplings on my U-boat. The ones I got with the motors were horribly big and out of balance so I made up some brass bushes and linked them with electrical flex sheathing. The trouble is it keeps slipping!
What is the flexible material you have used for your couplings? Your shafts even look to be of a similar size, mine are 2mm, so if I can get hold of something similar I will be in with a chance. My next experiment was going to be heat shrink.
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“Dirty British coaster with a salt-caked smoke stack, Butting through the Channel in the mad March days" |