If we're doing useful info.....
Swapping the pressure switch is a doddle, and doesn't require bleeding the brakes (well, I didn't, your mileage may vary).
There's only a couple of complications. One is the pressure switch connector, there's a metal retaining spring clamp thing on it, you'll need to pry this up with a screwdriver or something.
The other complication is that the bracket holding up the fusebox is cunningly located exactly where you need to put a spanner to get on the pressure switch. So unbolt the fusebox, push it up out of the way, unbolt and remove the bracket and you can now get a (big) spanner on the pressure switch. It 'cracks' pretty easily (I did it with a set of pipe plier things since I didn't have a spanner big enough, so not much leverage required) and you can then unthread it with your fingers.
