Interesting read! This has been on my mind as I've been researching whether or not to replace the stock .009 strings on my new American Professional II Jazzmaster with .011s - mainly because the .009s feel a little too slinky, even though I play with a fairly light touch. I came across a comment that the .011s will deliver louder output, but with loss of sustain unless the pickup is lowered. I didn't think only a few millimeters was needed though. I tried watching Pusheen's video on Jazzmaster pickup height and it all came down to "use your ears".