Spool Holder Drawer Separator

When you print the nice Spool Holder drawers from

https://www.thingiverse.com/thing:4604952
you come soon into the
situation that you want to stack them.
But this will not work out nicely as the nuts and bolts will prevent it from rotating nicely.

Put this spool serparator in between the spools and you can even rotate them or take spool easily off the stack.
print without suport, its already added.