I got a 4" Klir fleece filter roller. I have a Fiji Cube 24Advanced which has 2 4" filter socks. Klir makes covers for people with sumps with 2 socks but no one has any in stock anywhere. I can't use my Klir with out a way of capping the second filter sock hole. Anyone who does 3D printed parts want to try to make a cap to block the hole?