Bambu Lithophane Frame Plug Secures diffuser Panel

I love the Bambu lithophane frame, but after printing and using it I noticed two little issues: When using the frame in landscape, light bleeds out of the side where the light panel sits, which (to me at least) ruins the clean look of the lithophane, I know the frame is designed to sit portrait, which avoids the issue, but sometimes you just want a landscape lithophane. This plug stops the light shining out the side of the frame and keeps the focus where it should be, the lithophane itself. The second issue: the diffuser panel has a habit of sliding out if you move the frame around.So, I designed this push fit plug to solve both problems at once.It neatly blocks the light bleed for a cleaner display.It locks the diffuser panel in place so nothing shifts.Filleted edges match the style of the original frame and help it print cleanly.No glue, no fuss, just print and push into place. <img class="image_resized" style="width: 40.68%" src="https://makerworld.bblmw.com/makerworld/model/DSM0000