Which shortcuts should be in our library and which not?

[Roland Melkert]

I kind of think that door+frame assemblies would be significantly more useful than tire+ wheel ones: tire generally share the same origin as the rim so they are extremely simple to assemble. Proper assemblies of door+frame is often much more tricky. 
Actually I'd like to see shortcuts (in both cases) only if assembly is not obvious.

Placing them isn't that hard indeed, but finding the matching pair is imho.

Although some kind of formatted keyword could solve that problem.