Prusa Lack Enclosure top stack leg fitting

Stacking a third Lack table on top of my Prusa Lack table enclosure made the top too high for my taste, so I sawed about 5 inches off each of the legs. Four copies of this thing screw into the corners and top of the middle table so the top table is stabilized on its sawed off legs.

This is a remix of the thing that stacks a Lack table without sawed off legs.