Modified the original model to use magnets since I wanted to hang my guitars from an exposed airduct in my basement. Use tree supports only on bed. I designed screw pilot holes if you'd like to go that route, but the screws that came with my magnets were too long so I opted for glue.

I used the following magnets, but searching amazon for ‘150lb magnet’ yields a lot of results that would work.

https://www.amazon.com/dp/B0CD7BPLY7