Please, help me understand the use case for these. I assume most folks won't mount these exposed, so you'd end up with the undermounted on your CP. If that's true, are they just a very high-quality jig for where to drill the mounting holes for whatever hardware I have?
I want believe that these can be an enabler for more folks to make modular CPs, and drive a stake through the heart of all future frankenpanels, but I don't see it right now.
It could just be lack of sleep that's making me stupid, or the lack of sleep and stupidity might be entirely coincidental. :-)