Thank you Brendon
Next up was an oil tank. This was made from a length of 20mm dia 2mm wall brass tube (a 'trial' cylinder liner from my vertical engine). This is rather thick walled but allowed the connection union to be screwed in.
The base was a piece of 2mm thick brass strip silver soldered in place and then turned to match the tube. The bracket was from the same material this time soft soldered on. A hole for the union was tapped M5x0.5.
The cover was turned from a length of 20mm diameter aluminium. There is a 1.5mm breather hole and the O ring was one from the experiments with an O ring as a piston ring on my vertical engine.
The turning was done using the 4 jaw SC chuck as it is on the lathe for my injection/floating reamer holder experiments.