John
when you were stuck with the gland face of the cylinder, could you not have pressed a boring head into service, or at last resort do as i have done in the past when faced with the same problem hold a lathe tool in the four jaw offset to the required rad.
after all its bot the whole face that is critical but only the bolting face.
A point for others its as well to mark the gland bolting face with a couple of discrete pop marks , just so do do not forget which it is
the drill lip gauge sure brought back memories I was introduced to those when I started work as an elect apprentice in 1962 we used the lime wash to coat the up stand ( the guys that did the setting out on the marking out slab used it to coat the work to show up the scribe marks ect. )
great vid as always John I think I have pieced up a tip with all of your previous ones
Stuart
ps looking forwards to more