here's a bit of info for other "dyi" depending on the style of the plate there may be no need to remove the front wheel on your bike. both my c5's had front plates....that said unless you have sturdy type hands!
1.run the tape down the centre of the guard
2.set up your plate position as discussed further up the thread.
3.undo and remove all 8 bolts plus the disc
4. pull the guard up and then slide a piece of flat timber between tyre and guard
5. drill the holes for the plate. the timber will hold the guard steady and stop the drill bit from puncturing the tyre.
6. remove timber -set plate in position - pull up the guard and tighten the nuts up.