I liked this one!
Imagine a walls going down and Puff no base xD
Anyway ... if that is the definitive recipe, maybe change with this?
Portable solar panel <-
This item is to put on your modular armour to create solar energy ... maybe its better than using electronic circuits?
just saying tho...
EDIT:: also that could be super costly =p

yeah.. maybe something not too costly... maybe create a intermediate item of the wall, to put more process in the thing... Construct a small solar panel (with some circuits, copper, steel, sulfuric acid fluid maybe to difficult) , and them use the small solar panel to contruct the walls...

I agree with lamp181 this would be interesting because I normally don't build walls too often. this would give me more incentive to build more walls.

nice!