Taking gazorpa's ceiling hook's idea, I went one step further and made it stronger.

If you're securing directly into wood, use, as in the photo, a #12x1" wood screw. For those who are securing into drywall, use the (as in the photo) a large plastic anchor, then screw the #12x1" wood screw into the anchor.

*** For those who have a Prusa i3 MK3 printer, I've included a gcode file for making four hooks/eyelets. All you have to do is use PETG and you're good to go!

Make sure you leave the file in its original orientation for best strength results.