Customizable hanging spice jar rack

With this rack you can utilize the space below a shelf for small round containers with herbs and spices (or anything else).
No drilling or glueing needed!
All that's needed is a removable board in the shelf.
The default settings will be suitable for a sixpack of the "Ostmann" spice jars which are probably quite common here in Germany.
Otherwise you can simply change the diameter and height of a jar, as well as the number of rows and columns and the thickness of the board under which you