This is operator panel i designed to my custom control system and already used it in few projects. You can use i2c expanders to make it ultra easy to hook up with only 4 wires. Keep in mind that you have to solder keypad expander exactly like on photos and that may require desoldering exsiting pin headers.
For fastening lid use M3 wood-screws and for lcd any m3 bolt, screw it with a little force to make a thread.
The author marked this model as their own original creation.