Hey ! Thanks !
I already started looking into something a bit simpler / boring , I’ll try to push the details on the model and try to make huge rows of shelves.
But I’ll take a look at your script, that’s something definitively useful to do and as a lot of applications.
This post just came out, that’s along the same lines :
It uses recursion too, but, as long as it’s not too slow to compute 
I’m really looking forward to look into these kind of base pattern and test different applications, so I’ll
take look as much approach as I can for inspirations !
Thanks for sharing !