Oh cool, thanks for sharing. That keyboard has a similar shape to the Kinesis keyboard I got a while ago. Could never really get into it though. It was nice for typing with two hands once I got familiar with it, but I think it made one-hand typing too difficult and there were actually a number of times where I'd have one hand on the mouse and the other on the keyboard and just need to do minimal typing. I should give that keyboard another shot though.

Which key switches the layer/function of the keys? I think something like that is possible with the keyboard I have as well but I haven't explored it at all

I switch layers with my right thumb. Any key that has LT -> 1 (or whatever number) switches to that layer while I’m holding that key. I could set it up to not have to hold the key but then I forget what layer I’m on lol