Sine bar errors

[C-Bag]

Thanks Marv and Paul. Thanks for breaking this all down.

As a machinist wannabe who most of the setups and processes are still idle curiosity I take for granted things like you need a Starrett Sinebar and a set of gauge blocks. That's what Mr.Pete used so it must be so. But seeing the Blue Collar Sinebar and now this thread have changed all that. And in so many ways exemplifies what Homemade tools is and should be about.