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Page2 Backplate

I had also a casting of backplate. But I can not imagine how to chuck it in 3 jaws.
So I turned out from bar stock.

Page3 Cylinder and Cylinder Head

Cylinder is only turned out from leaded steel according to the log.
But there are many process, thread cutting, boring, reaming, making transfer passage,transfer belt, flange. It took about 2 weeks to make it.
About transfer belt, I had a point that I can not understand from the drawings.
So I send an e-mail to Mr.Roger and I could get the answer from him in next day.

Fin cutting on the cylinder head was done using an dial indicator and digital caliper as shown below. (If you look it carefully, you will notice that it is not fin cutting but cutting transfer belt by hand made boring bar. The process is same)