This is a remix of TheMightyPong's excellent StackFinity! model that allows you to use gridfinity in ToughBuilt's StackTech 3 drawer and 1 drawer mobile toolboxes. After printing out several drawers worth of the levelers and OG grids and some bins, it occurred to me that the middle gap in TheMightyPong's original design was roughly half a grid's width. Sure enough, a half grid bin fit in that gap. (FYI: a half grid bin also fits in most of the gap at the front of the drawer for both the original and this design.) 

That got me thinking that it might be more useful - at least for me - to have a contiguous grid and lose the space filling bin. That way, there is a bit more flexibility in layout. So, I remixed the grids to be contiguous and added a half grid column. I did not center the grid in the drawer, mostly out of laziness, but also because I like how the left edge makes contact with the drawer in multiple places adding a bit of stability. So if symmetry is your thing, you may want to stick with the OG, or remix it again. 

I'm still figuring out my layout, especially now that I got it contiguous, so the pics with bins are mostly to demonstrate what using that extra half-grid looks like. 

(Also, I know I left some tabs on the grids that are no longer necessary post-remixing. But they are so easy to flush cut, I'll clean it up if I ever revise this version.)