Gridfinity Electronic Component Storage, Arduino

I have a bunch of discrete logic, old microprocessors and Aurdino parts laying around in different parts bins. I wanted something that was standard were I could stack them and store them. I had seen others, but this had a stacking component. So I built the bins similar to https://makerworld.com/en/models/234549-gridfinity-esp32-1x2-bin?from=search#profileId-493143, which uses square holes, I used round. This is standard industry component spacing of 2.54mm on center, and I used 1.1mm holes. I also wanted to store them in this https://makerworld.com/en/models/1103813-modern-gridfinity-case?from=search#profileId-1099318. So I designed the trays to stack 3 high in the 12U case. Based on the Gridfinity spec, a 1U space is 7mm, I used the bottom 3mm to build the grid, allowing 3mm leads. But because of lip, it adds an additional 4.4mm to the case. Because of that standard 4U with lip would not allow me to store 3 high. So I played around with the parameters, and created bins within 1mm of t