I kind of fudged the other accessories to get as much room as possible. Not “exact” by any means. I was too lazy to redo all the tool layouts etc, but this is functional. 

It fits the “square” version of this screwdriver. The gap is tight, right against the edge, so there's room at the top so you can stick an index finger in, and along with the thumb indentation, pull it out. 

Check out my Gridfinity tips video for tips on printing successfully: