My "guess" as to why there were originally removable is they planned ahead of time to disassemble and repaint existing helmets from the white to the colors to cut costs. the images from the auction show that one helmet was painted white, green, yellow and back to white.Looking very sharp I`m wondering why those data cards have to be removable from the helmet? Couldn`t you just affix them permanently?
This is the reason I want them removable is in case I ever need to repair anything it will be easier to take apart. Second thing was I figured in universe, the cards were removable for programing and data retrieval, which was what my magnet design was suppose to represent...