I finished drawing the drawing. The next is production of the cylinders.

I sharpen it with a manual lathe.

First finish the outer diameter and drill a hole with a large thick drill.Then spread that hole with a spiral turning tool.
This video ↑ is drilling a hole.

The lathe became covered with cutting chips.
The knife shown in this photograph is a spiral turning tool.The direction is different.

It took 2 hours to a single cylinder!
It took a whole day, and my booger turned black!
I am tired!