Custimizable DnD Grid

Me and my friends do dnd after school on Wednesday and I though it would be cool to make a customizable map/grid. I wanted it to look good, simplistic, and sharp. I went through 3 versions and a couple hundred grams of filament. Then I realized a actual grid would make it a lot more playable, so I got back to the drawing board. And I came out with this, I did a couple tests and it was exactly what I wanted so I got to printing. I halted my progress on the grid due to classwork and one of my teachers, but one of my fellow dnd players brought it back up so I expanded from a 6 x 6 grid to a 12 x 12 grid with a final goal of a 24 x 24 grid which is a 2.6 feet I think. so I went through a couple Hundred grams of filament and reached a 6 x 6 but had to wait for a new spool of charcoal PLA Matte. Later I looked on amazon and saw nothing like this which is really surprising since who doesn't want a customizable DnD grid/map. So that's all of my talky boring stuff I just want to say this is sti