How much of a sin is it in your opinion to do extra cavities? I have a H Stingray and would like a HS. The extra cavity is under the pickguard and I don't expect to run without pickguard. Problem is I can't find a routing template for many specific bass pickups, so the route might not look perfect. I have one of those Fernandez Jazz basses that go cheap. I want to use it as a testbed for pickups. So at least under the pickguard you'd expect a P or H sized route. Of course the sweet spot isn't covered by the pickguard, so there's another decision to make. How much do you believe does the sound change from extra cavities, or enlarging cavities?