I got a projector for cheep on Amazon but after a while I decided to ceiling mount it. It isn't compatible with any of the standard universal mounts. So I purchased an Amazon Basic universal projector mount, screwed that to a piece of scrap plywood I sanded and painted white to match the ceiling and screwed this mount I designed quickly. I used a small drill bit to make the holes for the screws. The design was made in Tinkercad.

I printed the part in the orientation of the 2nd picture as it was only a prototype, and this is my first 100% from scratch design. It's not the best orientation structurally wise but was the least wasteful as far as supports.

Projector: https://www.amazon.ca/dp/B098TJP2H7/ref=redir_mobile_desktop?_encoding=UTF8&language=fr&psc=1&ref=ppx_pop_mob_b_asin_title

Amazon Basic Mount: https://www.amazon.ca/dp/B07MSYK43S/ref=redir_mobile_desktop?_encoding=UTF8&language=fr&psc=1&ref=ppx_pop_mob_b_asin_title

Creality

Ender 3

Doesn't Matter

Yes

100%