So here are plans for 3 machine stops for the novice machinist. These come in handy around the workshop no matter what material you work with, for producing repeat cuts and finishing to a positive stop. I have at least three books full of small novice projects like this, I'll post more in the future.
I found this plan on the web back in 2006, so the source escapes me now. G.W. Farquhar did the fine drawings.