Thanks to everyone here for the suggestions. Key pitch is now 19mm, I’ve removed the top row and added a second index column.
I’m not really pleased with the arrow pad placement, but I haven’t found any better place yet.
I’m still working on the layout…
look at the hillside keyboards and how they have the extra keys. you could use the same idea for your arrow keys.
That was actually very similar to my first prototype but I went another direction.