Exhibition and transport for 1:64 cars

Codename EX-TRA (exhibition and transport)
It is a rackable exhibitor for 1:64 cars collections (out of the carton), that can be easily converted to a transport case. The main idea is to avoid the moving of your car collection to diferente cases or shelves when you have to move it to a collector´s convention (for example). You can have it fixed to a wall or over a table or desk and transport them without moving any car from its position in the shelves.
To me is very helpful in moving them to weekend fairs on my town.

UPDATE: I have included the stl preview of the base module, and a picture showing a single printed module to show how it is.

Material: PLA
Layer height: 0.2mm
Infill 20%
Minimal supports needed