for that guitar, personally i would move the pickup selector switch to in between the volume/tone knobs (personally i prefer it there...but its all down to preference)
and then mount a threeway killswitch on the upper horn (ON/OFF/ON - so if it gets accidentally knocked, it doesnt cut out the sound for more than an unnoticable split-second)
so then you'd have:
1- only one body modification (a hole between the pots, and there should be room there for the switch in the cavity)
2 - doesn't look like a cheap little switch, as it would *look* exactly the same as the current setup pickup selector.
anywho, just my $0.02
edit:- my computer should turn itself off when i've been up since 430am just realised that my reply has very little to do with the topic.