I sat in an hour-long seminar at NAMM last January where Buzz Feiten tried to push the compensated nut concept. Problem was they never once mentioned string height, or the proper adjustment thereof. I assume they thought factory action on guitars was some kind of predictable spec and the only way to deal with intonation was to change the scale length a bit here and there. In my experience, intonation is so greatly improved by proper string height adjustment at the nut, that these attempts to monkey around with compensated nut adjustments would come in a distant second to a good setup by a competent guitar repairperson. And isn't it true that flatting the 3rd of one chord would, by definition, sharpen that intervel of another? Are you supposed to only use certain chords or play in certain keys?