very nice! Looks great. One thought.... If you plan on changing out your tires a lot, it might be easier to put the safety wire through some tubing and use a clip through the caliper bolts. It just makes it super easy to take on and off and you don't have to redo it everytime.
Bike looks great, I do this same thing on all my safety wire but i use the yellow tygon tubing they use for fuel tubing for r/c cars and lawn mowers. Its really flexible and keeps the wire from rubbing other stuff.