Prismatic Toll Height Setting Tool

[Blogwitch]

This is a post I wrote about making a tool that could be viewed from the top to set the height of my lathe tools and to counteract the negative tool tips on boring tools which no other tool could do.
Read it all as on my journey, I failed in the first instance, but got it spot on a little later.

Making a prismatic tool height setting guage for the lathe - Home Model Engine Machinist

John