I recently bought a 1965 Mustang. It's great, but had never had a fret level. It was buzzing a little and fretting out. I took it to a well respected guy and he did a great job, but it still buzzes a little on a few low frets of the low e string. I know that old Fenders are prone to this type of thing... and I can't hear it when the amp is on, only when played unplugged. How much buzz is acceptable to you? The tech is more than willing to help get it right, I just don't want to be unrealistic in my expectations. Thanks!