I'm interested in building a Jazzmaster with a H-X-H pickup config. Under the neck pickup option on the custom builder page, it says "Intended for use with 24 fret extended fretboard neck. Will not work with Pickguards." Maybe I'm being dense, but what exactly does that mean? To me, the wording suggests that the neck pickup option is intended for people using an extended fretboard neck, and if you do, you can't use a pickguard. That certainly can't be true and I've been searching for some clarification without much luck. Any help?