I am running a robot summer camp in a few weeks and using 3D printed grid beams for the structure and mechanical components. The beams have 8mm and holes of 4mm, I use M4 screws and it feels really nice.
You can have enough rigidity and clamping to do some interesting desk tools and some serious and not so serious mechanical contraptions! I have never built with real size grid beams, so I don’t know if it’s good for prototyping on other scales 
But with the little ones, a little box like this goes a long way.
The robots are coming out great and I wanted to share the 3D printed models with some friendly and experienced grid beam builders! I plan to do a replicad version of it (thanks @mikey for the link!) but for now this is what I’m using:
https://www.bananabanana.me/gridbeam_20250609.zip
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Very cool! Where you based?
Grid Kit / Village kit is still chugging along slowly.
I’m terrible at updates!
Recently got a printer myself so will def try these out!
I wonder if you could print connectors like Meccano ones… 
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Hey! I’m Brazilian based in Stockholm.
I am looking forward to see what you all have been cooking there! :3
This project as a whole was a huge source of inspiration.
It’s really fun to build with these 3D printed beams but honestly I think metal/wood or even mâché paper would be a much more interesting material 
My experience with 3D printed screws and connectors is that they wear out too easily unless they are larger and have smoother angles. For this scale I think metal or injection moulded harder plastic works best for my ~intense use~ hahaha
There is a related project that explore some interesting open source table machines ideas made with the same kind of system https://bitbeam.org/
Hey, a fellow Swede, almost anyway I´m in up in Härnösand (close to Sundsvall) and aiming to make wooden GB primarily but like [Rongomai_Bailey] its “hugging along slowly” but its really getting close now. I working on a jigg to make accurate GB manually and most important …can make other jiggs.
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Hello, fellow resident! hehe 
I’d love to make those reduced size gridbeams out of wood instead of plastics.
What is the tiniest jig you thing it’s possible to make?
Sizes was thinking was 4040 2020 and 10*10 to begin with, but i haven found a solution on fasteners on the smal ones, i think the fasteners will determen the holesize om those.
