Lithophane frame

This frame is designed to suite the standard Bambu backlight board.The frame prints face down, use a smooth plate for a clean finish. For the lithophane itself, create this so this it has overall dimensions of 156mm x 120mm, with 4mm thickness and a margin of 3mm. To assemble you will need 3No. M3 threaded inserts, 3No. M3 screws, and a hot glue gun to fix the light panel to the back of the frame.