3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
The r/functionalprint community is now located at: !functionalprint@kbin.social or !functionalprint@fedia.io
There are CAD communities available at: !cad@lemmy.world or !freecad@lemmy.ml
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No bigotry - including racism, sexism, ableism, homophobia, transphobia, or xenophobia. Code of Conduct.
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Be respectful, especially when disagreeing. Everyone should feel welcome here.
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If you need an easy way to host pictures, https://catbox.moe/ may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is 
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Speaking for myself, I usual just command strip the thing I want to hang to the wall. After all, whatever you print to attach to the dry erase board will likely need to be attached to the board. Why not just attach straight to the wall? You could also potentially print something that mechanically attaches to the dry erase board and attached to the wall via command strip.
You probably want to look for "command strip" and will have to dig through the results. Here's thingiverse: https://www.thingiverse.com/tag:3m_command_strips It looks like most of the results are what I described: "here's a mount for this specific thing that attaches to a wall via command strip", but if what you're describing exists it will be in those results.
Pretty much do the same thing, I leave the pull tabs visible to make it easier to pull down later but it's definitely the best option IMO, the block option is a good one too if you really care about hiding those. Found this one https://www.printables.com/model/330707-simple-dry-erase-board-mount on printables that's more of a hook type mount, but yeah, something in that could work too.
Thirded
I assume 3M makes those inserts for their hooks because it’s difficult to mass-produce cheap hollow objects with a firm flat back.
We don’t have that problem.
I have stuck all manner of things to the wall with command strips — power strips, 3D-printed hooks, boxes.. whatever has a flat back works fine.