Firstly the SUGRU update.
Sugru, if you have been following this blog, is the flexible black insulating repair compound which I used to repair some electric cables on my lathe. The cables supply power to the stepper motors, so they are in constant flexing motion when the lathe is operating. I wondered whether the Sugru would remain adherent and intact.
Well, I am pleased to report that after several weeks use, the Sugru looks as good as the day I applied it. A winner!
This is the flywheel after some sanding and polishing with a Dremel.
I might have to make another Stirling engine to use it.