Second side part measurement, how to reference datum features inaccessible from the second side?

[[Th...]]

A handful of parts have come up recently for programming, and they all share a common trait: blind holes as datum features. They all also have position callouts on features on the opposite side of the part. The components I typically work with are small and light with moderate contouring, requiring custom cradle fixtures and tension clamps to keep them in place. The geometry precludes vertical fixturing, so in order to get at the features on the second side of my part, it has to be held in such a way that the blind holes serving as my B and C datum features are impossible for me to measure directly, i.e. they face the granite. There are, however, several thru holes available to me that are accessible from both sides.

I know that there is a way to flip a part over mid-run, but I don't know how to reference my second side alignment back to the datum feature measured on the first side. I've read a little into the base alignment match utility, but I've never used it before and don't know if it does what I need. Is this doable?

[[Da...]]

Never used the match base alignment before , so can't say... otherwise can you turn the fixture on its side to allow access ?

[[Th...]]

Not likely. I don't have anything to securely hold these parts vertically, due to their shapes (lots of contours) and sizes (small). Maybe in a pinch I could hack something together to get one inspection done, but I also have to write these programs with the expectation that someone without CMM experience will need to run it. In practice, that requires me to have secure and repeatable fixturing, so that a part can be quickly set up and run, without time spent fiddling with clamps and manual alignments.

Edit: Never mind, I stumbled across https://qualityforum.zeiss.com/topic/20474-base-alignment-match/ from last August asking basically the exact same thing. I'll see if I can get Richard's suggestion from that thread to work.

Edited Tuesday at 02:26 PM