Like @geek2nurse said, it was in the FAQ, which is linked in the hamburger menu on every page of the forum. Here’s the link if you missed it:
https://community.glowforge.com/faq
It says a lot of things, but specifically to this topic: (emphasis mine)
If you would like information on operation beyond what is covered by the manual, you may discuss it in the “Beyond the Manual” section, and only in that section. Note that that section of the forum may contain information that is incorrect and may violate your warranty, damage your Glowforge, and cause injury or death. That is the only place for discussion of topics like:
- Manual settings for materials
- Modifying your Glowforge unit
- Third party add-ons
I also didn’t look at the FAQ until quite a while after I started using the forums, so I get where you’re coming from – I thought I had looked around a lot at first, too.