Top SKADIS allen key holder (parametrized)

This is a quick solution to make some use of the space above an IKEA SKADIS board.

No need for supports.

Source file/model (openSCAD) also provides printable dowels to connect in series.

! Disclaimer: The provided openSCAD file is for advanced users only, since some additional libaries are needed and I was quite sloppy with documentation of the code.