Modular filament storage system

This modular filament storage system allows you to story your rolls of filament no matter how many you have.
It only requires a tube with a diameter of 3cm and length of your choosing to hold the rolls of filament and connect the two towers.

The towers of 1 floor consist of
1 bottom part (stand) which can be screwed down.
2 middle part (tube) which holds the tube (mirror this part to have a left and a right piece)
3 the top part, for aesthetics.

The towers of 2 floors consist of
1 bottom part (stand) which can be screwed down.
2 middle part (tube) which holds the tube (mirror this part to have a left and a right piece)
3 connector that connects two tube holders.
4 middle part (tube) which holds the tube (mirror this part to have a left and a right piece)
5 the top part, for aesthetics.

etc.

The photos show my setup where I have mounted a two floor tower rolls of filament on top of the IKEA Lack cabinet in which my Ender 3 is placed. This required tubes of