I did the same ... only used 2 panels of 4x8 ft insulation material. A friend helped me hinge the two panels together with duct tape. We used commercial spray adhesive from Office Max to adhere the warm & natural batting. Then I duct taped the batting on the back for more security.
My design wall is folded behine a large bookcase in my living room ... with a beautiful mola covering it ... and it is now also a design feature in my LR.
It is easy to access and use. Once I have my blocks just as I want them ... I take a picture ... then take off the blocks in order and pin the rows together labeled.
It is fun to be creative.
alice
alice