Chester Comet lathe.
The numbers on my angle graduation strip wore away years ago and setting angles has been a pain.
I just started making some pullys to convert my minimill to belt drive ( dont ask
I came up with this quick way of doing it.
this is the plate the topslide mounts on to,
I drilled two m4 holes on each side and at the front.
now I can quickly fix a steel strip on the side and use a perspex gauge to set the angle.
here's one for the pulley,
and one on the front for screwcutting.
I works a treat and it's quick.
the angles might not be accurate to 30 seconds but they are consistent.
hope this is of interest to someone.
Oh, in case you did ask, I trashed the low speed gear in the housing.