I have a gallery of split keyboards, including this one. It's useful if you need an overview of what's available.

I have an ErgoDash with a Dvorak layout and a 3D printed adjustable tenting stand. The Djinn is fairly similar, though the additions are features I don't care for (encoders, screens, LEDs).

I've bought most of the parts to make a Lagrange, but still need to order the PCBs. I expect this to be an improvement on the ErgoDash, since I can include the missing keys (F1-F12 etc).

Just buying a Kinesis Advantage2 would probably have been a whole lot less effort.

https://aposymbiont.github.io/split-keyboards/

(And a discussion from nine months ago: https://news.ycombinator.com/item?id=26179311 )

https://github.com/diimdeep/awesome-split-keyboards