This is the video of the full scale mock up, referring to the earlier post.

https://drive.google.com/open?id=0B8XZqpo-BSRebTZwQlJGOTVNM2s

Note that the flaps on the sides of the top part are on purpose as it will be bonded with a Velcro connecting system that allows the 3 parts to be detachable.
For this mock up, i only use a single ply thick cardboard but perhaps i will try using double cardboard pieces to increase the entire structure strength.