This remix extends the walls up for stacking with shorter bits, but doesn't make it too tall for my toolbox drawers.  Pics show both short and long bits so you can see what we're dealing with - if anyone wants I can make a taller version to suit those, I just don't have the need right now.  

I went with a nice thick wall because I had some similar ones a user on Printables remixed from this same source model with a thinner wall but filling these bins with bits gets so heavy that holding them by the walls was a little sketchy.  These ones are a lot better suited to supporting that weight and are not derived from that model.

I have provided both a regular Gridfinity with magnet holes version, like the original, and a version with a Gridfinity Rebuilt bottom where I changed the base to half-pitch/half-sized blocks, which fits normal Grifdinity (100% compatibility with normal grids and components) but can also be placed at half-positions.  The base was cut off a bin I generated using Gridfinity Rebuilt.  That one's MIT license, which is compatible with the original model's CC-BY-SA so I went with CC-BY-SA licensing.
 

From the original:
My first try at creating a model for sharing. Holder for 64 hex screwdriver bits and a magnetic extension bit. Inspired by LTT Screwdriver Bit Holder, but made “from scratch” in TinkerCAD using this template.