https://m.imgur.com/DrEOCvAHow are the metal plates held together, to stop the whole thing falling apart ?
Is it possible to lock the Frozen Armor with a padlock ?
You can buy a small metal box and lock the Frozen Armor inside. Anyway, thanks for your suggestion, we may consider that in the future.
Is there anything holding the front cover together to the back plate (with the letters)
The back plate is held to the front cover with a
metal pivot. This pivot bolt anchors the two sides and allow them rotate on horizontal level.
As for letters, there is another piece of
steel grating which covers and fixes the letters after you place them in order; the gratings are fixed by small
steel screws.