Modification of Small Items Organizer by cruzher (https://www.thingiverse.com/thing:1666929)
Provides options to make organizer stackable (pegs on top) and interlocking (pegs on side). Also added holes to top and bottom to reduce material. The shelf is configured to accept 5 single height drawers; 2 double height-1 single height; 1 triple height-2 single; 1 quad height-1 single height; 1 quint height drawer.
I will eventually get this up on git-hub and make the solidPython code available.
To print this you need a print-area of at least 150x150x150mm