I have added support for whole holder as lot of users(including me) find out that
after some time is whole holder somewhat tilted, spool touching the table.
So now you can place spool on holder than insert support stand and problem solved:)
If you have printer on higher place as me(on wooden plate lying on tbe shelf) you can
use base extension for stand - just check the pictures, there is this extension attached with plastic strips.
I do not created whole holder, i have only extended design from kurioso(cylinder part):
I have also rotated this thing so now you can print it verticaly(with support).
Now you can use much wider spools(fitted especialy for filaments from PM - Plasty Mladec) - up to 94mm
Very nice original design!