Coming along nicely, you could put a drop of 5 min Araldite on the back of connections on your circuit board.
It may stop wires from sparking and causing a fire, may that never happen though.
Just looking at more pics, that led strip light could go around the inside of your lift up doors?
I've just fitted some on my awning 120 leds a mtr great light output plus off cuts for other jobs.