Seeing this board again inspired me to revisit my own custom. I really love how even with 14 columns it remains symmetric without using too many odd-sized keycaps (not against using a few blanks for the mods). And the arrow keys! This is the layout I’ve settled on for my own use: https://www.keyboard-layout-editor.com/#/gists/68b440125bd9755baf0fcb5faf19ed61
If it turns out OK I might have to get a case milled.
Yeah I never developed the muscle memory for the num row so it shouldn’t be a problem