Converting a Keyboard to Janko Layout

I wanted a keyboard that could be rearranged for different tunings. As usual I turned it into a DIY project. In this case I used an M-Audio Keystation49 Mk3.
Stephen Weigel's video on changing the keyboard layout on a KORG is50
• Changing the keyboard ...
Further thoughts on this project so far:
I don't know if the keys on their other 61 and 88 keyboards have the same dimensions. Or what other brands would work for conversion. Probably any keyboard, as long as you're willing to do all the R&D to get it workable.
The keys I created here are fairly minimalistic in the amount of material used, so they are a little more flimsy than I'd prefer. I think a more solid (filled-in instead of hollow) key would have a better result. The biggest weakness is the socket/riser between the key and the keytop. They have to be raised up to keep from pressing down the neighboring key when played, so there's no getting around having them on a post. But I could make thicker posts, and for non-reconfigurable keyboards they'd be all one sold piece without the joint to connect them. But that would need a redesign of the part that connects to the rail so that the black & white keys could be printed in the right colors.
The biggest issue with making these is the time required. It's fine to do it because you want a keyboard that you otherwise can't have, but doing it for someone else would only be worthwhile if you get paid for your time. And I'm fine with using a keyboard that I might break because I can just print more parts and I'm always taking stuff apart anyway. But making one for someone else would mean it has to be solid and durable, which also means more R&D to create and test an improved model. And print times for solid parts would go through the roof... probably 3 weeks or more of 24/7 printing just to get all the parts made after the design is done. And that would be a one-off because good luck selling multiples of these.
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