I wanted to test the dimensions before committing this design to precious ash, or maybe fir or pine or even cherry or walnut, I also have a lot of maple on hand. I used old cedar fence slats and scrap ply for the mockup. So far the dimensions (5x8x30ish) seem to work, I may try adding dividers before placing many more tools.
This cedar dents incredibly easily so the french marks aren't really my fault. I think the exposed edge plywood bottom accents the piece nicely.