I 3d-printed a crude shutter and super-glued it to the bezel: https://youtube.com/watch?v=oOkPP_5bjhs https://youtube.com/watch?v=oOkPP_5bjhs I think it would

I 3d-printed a crude shutter and super-glued it to the bezel: https://youtube.com/watch?v=oOkPP_5bjhs https://youtube.com/watch?v=oOkPP_5bjhs I think it would be about as easy to make a cardboard one.