My own take on the tool holders using the top groove. To be used as small bins/tool holder.

Tapered version allow to be closer to the edges. (and a bit less material usage)
FYI the 90mm height clears the front door.

Thinner version works well with the included scraper or pens. Divided version is meant to be 2x 1"sq. slots.

Meant to be printed without support, the internal chamfer are there to help with bridging a bit. 

(I checked with the slicer to make sure I was in the short travel orientation)

Included the step file to make editing/remixing easier.