I'm working on my 1st steel string guitar (a parlor) after building a half-dozen classicals. In his book, Kinkead drills a hole through the upper-bout transverse brace to gain easy access to the truss rod adjustment: a long hex wrench would allow adjustment without having to put your hand into the body. With the small sound hole of the parlor, this approach seems appealing. On the other hand, putting a hole through the brace does not seem like a good idea structurally. Anyone have experience with this issue?
