[culebron21]

Thanks for the detailed description. The idea with different function on hold is interesting. I wonder that you don't have the Tab key. Is it not used on Mac at all?

I also tried different layouts, experimenting about half a year, and in the end found the backspace under right thumb quite convenient (probably bc I still make a lot of typos on EDEZ).

[tpmoney]

Tab is up next to the Q on the left side, same place in qwerty. I tried using backspace in the thumb cluster for a bit, and it was convenient, but I found because I don't have good "home row" discipline, I was accidentally deleting too often.