For years, I have been extremely sensitive to intonation, and the majority of guitars drive me nuts. I've read many discussions about the various approaches to compensating for the inherent problems with equal temperament (Earvana, True Temperament fretboards, Buzz Feiten, etc.) but I'd still like to hear more input. I'd like to have someone put together a Warmoth Telecaster build for me in the near future. I've always been very intrigued by the True Temperament Formula One neck and this seems like a good chance to try one, but I know that it of course is a compromise too because the improvements may turn into disadvantages when playing in the less common keys that it's not optimized for. Plus, for a long time I thought that equal temperament was the problem, but out of the many guitars I've tried throughout my life, there have been a handful that didn't exhibit intonation problems to a noticeable enough degree to bother me. Because of that, I'm thinking that equal temperament is actually fine with me, but there's something about the setup/construction of the majority of guitars that knocks things a bit out of whack and equal temperament isn't being achieved, and those select few guitars had something about them that didn't cause that (and thus were able to achieve a result closer to intended, actual equal temperament). I'd like to become more informed about what elements of a guitar's construction/setup could have been contributing to that. And if I'm not mistaken, many synthesizers generate equal tempered notes, and those don't bother me at all, so I don't think equal temperament itself is the problem. My hands are small (approx. 7.25" from the end of my middle finger to my wrist), so that may be one factor. I've never really done any kind of conscious comparing between different neck specifications and profiles, but it makes sense to me that my small hand size could be causing me to grip too tightly with some neck profiles. Do any fellow small-handed players have recommendations about what nut widths and neck profiles may lend to a more relaxed grip/fit? Another thing I wonder about, and is the thing that I'm most intrigued about, is fret size. I've got the suspicion that since I may be a bit heavy handed grip-wise, taller and/or wider frets cause me to push down too hard and pull the strings slightly out of tune (and thus they aren't achieving the intended equal temperament -- maybe something like a major third, being already fairly sharp in equal temperament but not enough to bother me, gets pulled further sharp and passes my personal threshold of dissonance?). Is it plausible that smaller frets might circumvent that string pulling and lead to improved (closer to actual equal temperament) intonation? I feel this very well could be the 'missing' factor since the vast majority of modern guitars seem to be made with large frets, and the vast majority of guitars drive me crazy intonation-wise. Warmoth's stainless steel 6230 fret wire is .080"x.043", would that be sufficiently small to circumvent the string sharpening (I should also add that I hear the same intonation problems in many other players' playing, so I don't think my technique is especially bad)? I know another issue which can cause the strings to go slightly sharp is how the nut is cut. I've had all the guitars I've owned set up by quite respected techs but they've all still exhibited the intonation problems I speak of, so I'm still thinking maybe the fret size was the key factor. However, what material would you recommend? Graph Tech TUSQ seems interesting. Are there any special instructions I could give the luthier other than "don't be afraid to cut it deep"? And of course, I know that the bridge/saddles are the most obvious element of setting intonation, but I also believe that it's the least likely to be the problem since the issues I've experienced point strongly towards being caused by fretting. Anything else I'm missing? I'd really like to get something that plays perfectly for me like those couple of 'magic' guitars did.