I wanted to carry a Squirrel on my motorcycle but space is limited.
I made a box out of some plastic from the scrap bin at a plastics company. (Canus Plastics on Lisgar in Ottawa). I found two sheets that were 12.5 inches by 4.5 inches. I glued some 1/8 x 3/8 basswood around the frame of one side using epoxy and then used elastics to hold the other side on.
I then made a flat version of the Squirrel. I made the winglets and horizontal stabilizer removable. I cut a slot in the motor stick for the horizontal stabilizer.
I decided to carry the propeller separate.
It turns out that it fits easily in any briefcase. Now I ALWAYS have a Squirrel with me. Even at a pub!