Well, currently, because I've got an autotune with my PC5 on my bike, I really needed a switch to be able to switch between map and learn mode.
Especially if I'd had it in learn mode and been out for a ride, if I turn the ignition off, the map trims the Autotune had made were all lost!
However, by having a switch somewhere accesible on the bike I can switch between the 2 on the fly AND when the bike is in learn mode, I can save the trims to the base map by turning it off rather than losing the trims everytime.
Sooo... I got 1 of the little ABS boxes I bought from RS for about �1, a switch I just happened to find laying around and some -VERY- special stainless steel braided fibre coated 2 core wire that was going to go to scrap and made up a nice little box switch...
Just need somewhere to mount it now...