Roughed out one of the Monitor's valves in a spare moment on Tuesday carbide to get most of the metal off and then finished to 3/16" with HSS

Then finished it off last night, firstly by blending the head into the shaft with a round nosed tool, then the 45deg face, skimmed the 16mm bar down to 5/8 and lastly threaded the end 2BA

While it was on the bar I lapped it into the valve seat

After sawing off the head was rounded off to give a slight crown

Then did it all again for the slightly smaller inlet valve

J