How did the neck depth feel to you, was it significantly deeper than your American Standard’s neck?
The reason I pose the question is that I have two Strats – a 2002 American Standard that I’ve had for four years and an Eric Johnson signature model that I bought very recently. Since playing the EJ, I’ve really grown to like the larger neck (and the EJ guitar as a whole – what a cracker). Now I would like to replace the rosewood fingerboard neck on my American Standard with a larger rosewood fingerboard neck. The John Mayer neck would seem like an ideal replacement as it is apparently bigger than the Am Standard neck and it has the vintage tuners that I prefer, and a fret size that I like (although I am concerned about your reports of rough frets).