Mcgyver, excuse me, it may be the wrong place for my questions but I can't send the private message to you.
I have seen the image of your "toolmakers cube square and parallel" in the old "Way lapping, Scraping, Gib adjustment and Lock screws" thread of this forum.
Would you be so kind as to answer the couple of my questions, please?
1)What dimensions it has?
2)Is it cast iron or steel?
Alexey