Here is some of the things I tried on my build.
I went with a 2 line display for a more compact box and I wouldn't have to mess with the ribbon cable on the 4 wire. I got someone to print me a "clear" case, wish I would of just went with a black case. Clear isn't very clear and it shows all the imperfections really well.
Here is what my back looks like with all the insulation in, I had to cut a spot for the SSR in the second and final pieces of insulation. The first piece of insulation is still uncut. The side insulation has two slits in it and is folded backgiving two layers of insulation between the SSR and the inner wall.
Here is a pic with the final insulation removed and can see some of the wiring, the SSR is held to the side wall with an elevator bolt JB Welded onto the side wall. I will put a pic of what an elevator bolt is below.
Just a pic to see where the probe is 1" below the top on mine.
I managed to get all of my wiring out of the original cord hole by cutting the cap to allow the Cat5 cable and temp probe to fit as well, so I still only have that one hole in the bottom.
Here is the stickers I made for my switch.