Ok so the Mysterium design is open source, so:
- it was forked
- loaded into KiCAD
- the MX only pads were replaced with a library that supports both Alps and MX
- Bottom row was adjusted for AEK layout
- function key pads were rotated 90 degrees to support the funky AEK caps
So this TRULY is an AEK-only Mysterium. Maybe someone else would want to take this, revert it back to Tsangan bottom row, un-rotate the function keys, and make a more generic Alps Mysterium, but this is not that.
The other thing I had to do was update the plate file for Alps. I totally cheated and created a “Good enough plate.” I generated an Alps plate in SwillKB and then superimposed it onto the original plate drawing. When I had things lined up I deleted the original key cutouts, leaving only the new ones.
This worked beautifully and I’ve had no issues, but it should probably be done properly by someone with real CAD skills as this quick and easy plate modification is probably off by a tenth of a mm somewhere, and some German guy will try to put one of these together and beat me over the head about it. I however cannot detect any misalignments, etc. Looks good so far.
The only thing that would make the plate better is if SwillKb could create the mounting post for the spacebar. In addition to the stabilizers, the AEK spacebar has a removable mounting post to help keep it straight.
The current plate design does not have a cut out for that.
I ordered the plate from Sendcutsend in 1.5mm stainless steel.
I REALLY wanted to order the plate in copper for $80, but the plate wasn’t fully tested when I made my order and chickened out. Maybe if I am crazy enough to do another…
I also had to do a lot of other things unrelated to the AEK modification (I bought unflashed Atmega32a chips and had to learn AVR-GCC, compile a boot loader for it, buy and ISP flashing kit, and flash the boot loader, etc.) But that is just part of building a Mysterium if you don’t buy the pre-flashed chips and the instructions are on Github.
Just waiting on the Acrylic case from Ponoko!
Once I verify the Acrylic case works with this build, I will post everything to Github and give away the extra PCBs I made for the cost of shipping. And I have one extra plate as well, though it is a little thin and you may have to increase the thickness of the top acrylic to compensate.