It's taken 10 prints (avg 1h 20min each) of a concept with the new Tetwin switches to get to this solution. It's suprising, as every time I impemented milimetre  tweaks, I was thinking that this was going to be "the one". This one offers passable ergonomics for all fingers, though I admit that the thumb button may benefit from being a few more milimetres away from the centreline. I'm not going to do that though, as 41mm wide allows me to do this for Teti:

The key spacing is 21mm, which is slightly larger than the 20mm used for the #Tetent Timespy [gd0136]. The height offset is [-1, 0, -1, -2] (starting from Finger1 (Finger1 is the thumb)) where on gd0136 it's [0, 0, -2] for the fingers.

This layout allows for typing/mouse usage without tenting being a mandatory requirement. This means that I don't have to worry about custom leg straps or table clamps.

Now that I'm writing this log, I think I'm going to move the OLED to the top centre (where the top USBC port is now) for better visibility, especially for when cables are connected.

Actually... that looks cleaner and more ordered than the design I've had for the past 24 hours.

Looks even better with some actual USBC ports instead of placeholder gaps.