[MarkCole]

There is also the option to do half bins / half grid pattern at the edge. So you have the normal 42x42 grid pattern, then on one edge there are 21x42 sized boxes. There are a number of designs that support the half grid pattern. This would reduce your maximum lost space down to 20mm, and you would still have compatibility with the gridfinity system.

[Gigachad]

I’ll have to give this a shot. I can always put the generic bins I can generate as half size on the edge and put the downloaded ones in the standard grid.

[91bananas]

Or print a custom spacer to fill any gaps you have on the edges that also has holes or slots to hold even more random crap.