Quite excited about this find!!! I have been struggling sometimes with the indented ring around my screwed in jets after I upgraded my Intex small corrugated filter to a real pump and 1.5" PVC and those screwed in eyeballs....
Ken @Ken_38937 --> Thank You!!
Recommend to print in PETG 3 walls, 10% Cubic infill (don't think need to be excessively strong just the lines of the indentation needs to be perfect!
Let me know how yours turned out!