I noticed that there seems to be, in addition to the x-bracing, some other sort of bracing inside my 330. The top of the body appears to be 1/4" thick at the soundhole edges, but if I look inside there is a SECOND layer of wood under the top that doubles the thickness. It extends to maybe a 1/2" from the soundhole.
I can't tell if the top of the body is just carved that way or it really is a second layer of wood glued under the top. Either way, it makes for a very sturdy (and heavy) Rickenbacker.
