It is so much harder to access a nut that's in the heel as opposed to the headstock. A special angled allen wrench is needed, which usually gets rounded off, or the owner will have to remove the neck to get at it. I've never understood this. My first bass had it in the headstock, but then I bought a MIA Fender P which had it in the heel and thought nothing of it when I bought it, but I quickly came to despise it. I recently bought a Squier, and I just decided that I will never buy another bass with the adjustment nut in the heel. I was even GASing for a fretless Tony Franklin signature model Fender... Until I saw the cut-out in the body for the adjustment nut at the heel. Any thoughts? Am I alone on this? Why is this even done in the first place?