I’ve already had a brief chat with Hans about that (waiting for my 40m kit to arrive ) he also suggested using an OLED display (as I wanted a green display for my project) to save a little extra power. He is planning on changing the displays to the green/yellow type as they can be read in the daytime with the backlight turned off.
I have cleaned out the internal electronics from a broken clansman hand crank charger and that will be the case for my new QCX kit, using a drop down converter for the 24 volt Nicad batteries. It will have a small speaker built in as well as it’s own keyed, so completely self contained. I also have a second spare case and will probably build an emtech tuner into that.