Yah, Lane, you're right. Good info. One simple little thing you can do that will pay off in spades is record your guitar (playing the same thing) at least a dozen times (little thirty second excerpts will do) from every angle you can think of. You might be surprised at the optimum placement.

On my former working Guitar (a Japanese Lowden) the mike aiming at the 16th fret and coming in at a 45 degree angle provided a great sound either when recording or live. On my Martin 0-18, that set-up totally sucks. With the Martin I place it about 10 inches away straight into the hole, and it works wonderfully.

Do the same with a D-28, and you're asking for feedback and overtones.

Do the same with a Telly and we'll send you packing.(that's a joke)

Rick