DM42 is now open-source!

[grsbanks]

Also, I'm not sure the tester was aware that Casio have been selling OEM PCBs to alternative manufacturers for as long as I can remember.

Back in the day, Boots (a chain of pharmacies here in the UK) diversified and sold green VFD machines (yes, that far back!) under the Boots brand that were just Casios with a Boots label slapped on them. The stationers WHSmith did likewise with later LCD machines, both 4-bangers and scientific.

It's nothing new and it's still going on today. Even HP is selling rebranded Casios.