About this 3D model

Hi all, This is origanaly uploaded for a competition for 3D printer hosted on My Mini Factory. https://www.myminifactory.com/pages/bbcmicrobit The Case.stl can be printed without support and must be done on its back- with the walls up The Plate.stl will need support material but only due to the battery holder piece. The battery pack slot is the origanal one that comes with the microbit. Any recomendations and fixes please let me know :)