Holder for spool holder Tush

I printed the fabolous Tush spool holder (https://www.thingiverse.com/thing:2047554). However using the 2,6 kg spools I struggled a bit with placing the holder in the right position and once they even tipped over creating a mess. So I created a simple holder for the holders.

This is specifically for spools measuring 10 CM between the edges.