[knowaveragejoe]

> I agree though, my dream for years has been an open source CubeSat bus design that covers say 80% of academic CubeSat use cases and can be modified by the user for the other 20%

Surely this, or something like it, exists?

[Sanzig]

Not really. There are a couple of open source projects (LibreCube being the biggest example) but they aren't flight-ready.