Thanks for the writeup, I installed my fog light pretty easily yesterday. I didn't understand what you guys were talking about with the Loctite, but after attempting to unscrew the original fog light, I immediately understood what you guys were talking about. I ended up using an electric drill to unscrew the bolt, which melted the plastic, freeing the screw.
I was thinking of maybe adding a microcontroller later to do some pulse width modulation or blinking. I think if I come up with a cool idea, I'll build my own PCB and start the software process
By the way, is there any reason you guys are using Relays (moving parts, has a limited life) to control the blinking of the light? Why not use a transistor?