About your Modeling challenge! :)
I know one very funny! :)

Dessign a space cubic module for starship! :)

And also a little cool headache as you can study the 24 links! ;)
As a Cube has 24 positions in the space you can make some crazzy infinite combinaisons!

My little video in French with this technic of 24 Positions so you can Cut the sound! :)
http://moiscript.weebly.com/video05-plug-su.html

24 positions of a same module! (linkable of course in this case just by the little middle square! )





24 Positions
by schmolldu
on Sketchfab



with a module a little more organic! :) Here 100% linkable!


For inspiration : modeling only by Sketchup! :)
By xlrlxi http://600v.deviantart.com/gallery/




Beauty of all that is you must find a specific form who must linkable by a face on each face
and had every faces different! A very tricky cool challenge! :)


Another inspiration :)