While I was at the lathe I decided to make a replacement vacuum cylinder. The casting supplied was actually one of the better castings but it was not quite the right shape and undernourished when compared to the drawing.
So a fun time was had turning a new one an dressing it with studs/nuts. Those who are paying attention will note the odd arrangement of studs which I took from the drawing. I had an interesting time working out all the different angles four at 45 degrees and the other three at 56.25 degrees from those.