I know the basic concept of the strings pulling on the neck creating bow and a truss rod pulling the neck the other way. Now what I'm wondering is does the neck still bow where it meets the body? Like on the top 5 or 6 frets on a regular P or J. I'm wondering this because I'm thinking about how it would affect the way a fret leveling should be done. I like my action fairly low with a very small bow in the neck. If I've leveled all the frets with the neck completely flat and only the "free" part of the neck bows, then the top frets are going to be the first ones to buzz when I bring the bridge height down. I did a fret leveling on my most recent bass, and the action is really good. The top frets do buzz the slightest amount, not enough to bug me but enough to make me wonder if there's some special method of leveling the upper frets.