They are these. They've held up pretty well. I have noticed esdf (instead of wasd) are smoothing out a bit, but not bad overall. Really happy with how they look in person!
Black 108 Key Cherry Profile PBT Double Shot Side-lit Shine Through Translucent Backlit keycaps for MX Mechanical Keyboard Filco (Only Keycap) https://a.co/d/6Cy6JHQ
That thing is wild! I love a cool looking keyboard... Is there a source you'd recommend for something like that, and How does it feel for everyday usage?
Here is a build guide. I bought my components from Little Keyboards (MX hotswap v3.0.1 kit in purple, gray tint technician case, 128x32 white OLED screen x2, and Elite-C v4 x2). I believe my LEDs came from Amazon, just making sure I matched the sizes in the build guide and whether they were surface mounted (SMD).
I will probably eventually post my first ortholinear, an Ergodox infinity, which is where I got my first real soldering experience (and a bunch of extra Cherry Browns). Neither keyboard was too difficult. My biggest suggestion would be to take your time. I spent a lot longer than average and I think I only had 1 or 2 solders that needed touching up at the end.
In everyday use, I love it. It's taken a bit of tweaking to get a layout I'm really happy with and getting used to that, but it is very fast and efficient having everything within a key of the home row. For me, the biggest change in my comfort while typing was switching to ortholinear, especially split, and I recommend it to anybody and everybody. If you're on the fence and not sure about having so few keys, there are other similar boards that have more rows. That definitely eases the transition. I have never been big on using the number row and opt for the 10-key instead. I just have a layer set up to cover that with my right hand just like on a normal board.
I appreciate the detailed response! Once I started looking at the guide, I realized I might be looking at the deep end of the custom KB pool... I might take a swing at a custom accessory KB before attempting one like this!