Speaking of tinkering, you could have a builds/devices/setups section, with each containing multiple constituent parts (as ingredients) with their being a corresponding recipe for each. So users would be "cataloging their builds."
This is what is lacking here: https://clz.com/ but I think https://hackaday.io already does what I am talking about - a "Github for inventions."
You are welcome to use my domain for that too, but will people go to all the effort to upload their builds? What is the return? Are there IP or safety issues?
Perhaps you could focus on computers, and make it a help/troubleshooting destination, and way for people to be able to recycle things or look to that goal.
Solar and DIY energy builds is another large area. Could also focus on selling or affiliate commissions.
Maybe have a way for the site to load up with data using text files that people can either upload or keep on their own server. So there should be some type of syntax. Laboriously filling out fields is a time-sink in my view. Even signing-up can be seen as a pain. So local-first data entry with a little syncing app that gets the site to come and collect locally whenever its pinged is the goal.
CLZ has syncing with barcode scanning: https://gemini.google.com/share/b7ce6f31fe12
Maybe a way for users to also download the entire site for off-line browsing? Is there a need for that? Keeping the entire site off-line would be interesting in the age of AI vacuum cleaners. "Group Sync" for all the text-content.
Also, see my recent comment about meetups. https://news.ycombinator.com/item?id=48259386 - Park Jams?