Thanks for posting this thread...its finally convinced me to go and do mine - had the kit sat on my shelf since November lol....
Took less than an hour incuding fiddling around and a dizzy spell (lying upside down in the footwell = fail) - had to splice in to the wire for pin 31 but is otherwise all good. The tractin light turns on and off with the switch so i'm happy 🙂
Will see how it feels later - should be a good test as its been raining quite heavily...