Final Idea

After loking back over my concepts and my research findings I think that the concept that I am going to take further is the one with the door as I feel that this could have the potential to be a very clever product with regards to its space saving element and if I could incorporate some of the other elements I've looked in to also this would make it even better as by having a combination of all three would make it a solid product. My calculations are as below.

Space saving
+
modular
+
expandable
+
door
=
final concept