Hole cap for spool holder

Super simple print, I really like the spool holder, but in fact I hate the hole that it left I had two choices, print it again filling the hole, or make a cap I choise the second one because in this way I can print it in different color (but in my case I used the same white) and also because if in the future I'll print another part of the spool holder, I can use the part that already work