There are two reasons why this isn't making any sense. First is my definition of overstands, second is that I gave you a bogus number. I first heard the word "overstand" in a lecture about violin geometry. It was defined as the amount the neck is above the top at the joint, not including the fretboard thickness. Its typically about 6mm on a violin as shown here (i'm having trouble inserting the image I want, go to this link and scroll down to figure 5) http://www.makingtheviolin.com/Fitting_the_neck Another way of thinking of it is that an instrument with the fretboard sitting on the top (a Martin flattop, a Les Pau) has no overstand, Fenders and LPJr's and SG's do. An archtop is like a violin, it has overstand and it increases with neck angle. Therefore, with the usual 0.625 (16mm) neck pocket, 1 inch (25.4mm) heel thickness, and 0.125 (6.3mm) fretboard thichness, the overstand is 1/8, 0.125 or 3.15mm. Add your fretwire and you are absolutely correct, the height of the frets in the center of the board is very close to 0.420 inches or about 11mm. To confirm that I checked my tele clone - I have slightly less than the full 1/8 inch of overstand but when I measure the fret plane it is 13/32, or 0.4065, or 10.5mm. I'm really sorry about the mistake and the confusion. As I was preparing this little discussion I wrote down a pile of notes so I wouldn't forget anything, it looks like I simply picked the wrong number for that value. It should have been obvious - 5/8 pocket with 1 inch heel leaves 3/8 total height at the center, subtract 1/4 for the fretboard and, bingo 1/8 inch. Duh Two more thoughts - the idea of overstand isn't really that significant on a guitar like it is on the violin. A much better parameter would be the total height of the top of the fretboard off the top of the guitar. Obviously on a guitar with a one piece neck their isn't a separate f/b to measure to. Also, I have one set of plans for a "vintage" stratocaster that shows the depth of the pocket at 0.594 inches which is kind of a weird number (it corresponds to 15mm). I haven't built a guitar to those plans but what I am thinking is the shallower neck pocket allows the tremolo bridge to float above the top - I'll have to measure this on the next strat I come across. Clear as mud?