2mm at 1st fret, 4mm at 12th fret The guitar (a beautiful Tanglewood TW170) is basically unplayed, with a barely-marked first fret, but I was told by the seller that it is around four years old and the top has probably crept a bit - I can't believe they ship new ones with action this high! The intonation is really bad as a result - about 15 cents sharp on the bass E at the 12th fret - and it's incredibly hard to play any kind of barre chord.. I'm going to let the professionals fix it, but as the nut and the saddle will need attention, should I ask them to start afresh with bone blanks? The existing parts are plastic, although the saddle is a compensated one. I know the nut will come out easily because it fell out when I changed the strings and I only put it back with two tiny spots of PVA glue.