I know the existing travel dials are not a reference like a gauge block, but a few quick checks against my decent axis, X, and they are in agreement. Good point about repeatability. I'll have to perform a few "user acceptance" tests once I have all the components installed.When you are all done I would check the accuracy/linearity of the scales using 123 blocks or similar measuring blocks. Yuri and others have reported issues (linearity as opposed to repeatability) of some of the Asian magnetic scales like Ditron and those sold through AliExpress. I use ones from Electronica and have not had any issues, would be worthwhile to know which camp the Aikron magnetic scales fall into.