To make this work with the original enter key, i had to reverse-engineer the hinge mechanism. It's rather simple, two bent tabs in the plate, 1.5mm holes for the wire/axle. I measured the spacing, and modified the design a bit to be easier to cut, and also bend without special tools (cutout in the middle of the tab allows to bend them just with a screwdriver)
my test plate and the original rusty one:
https://youtube.com/shorts/_MkETLiw7kI <-sorry for that i have no idea how to force youtube to make this a regular video, not a short.
One caveat is that the enter key is NOT mounted on the switch at all. It just loosely lays on it, and the only thing preventing the user from lifting the key up is that little claw/latch/whatever that is visible from the bottom. So the cutout in the plate for it is neccesary to get right, otherwise it won't work properly...
After figuring this out i could continue with the design, next post i'll show some pictures of the cases i have drawn (sheetmetal) for both original ES100 keyboard, and the big one. Also featuring adjustable feet mechanism, i feel like they are really neccesary with the profile of the caps, the boards have to be at quite big angle to be comfortable to use.
