This looks fantastic! Congratulations.
I’m thinking about making my own magic mirror too and I’ve found BENQ GL2450 monitor and relatively cheap price.

However, I have a question that I hope you can give me a few pointers on. How did you manage to get the big backside of the mirror to be so slim? The monitor itself has a large panel in the back, how did you place the back panel boards to make it this slim?

Hope you can help me out by answering. A picture of the backside of the panel would be awesome, if you can take one.