After flicking through a very respectid guitar mag the other day I came across an article on guitar setup by a famouse guitar tech and repair man. I notice a paragraph on neck relief. It said that depressing the string at the 1st and 17th fret the gap between the top off the 8th fret and the bottom of the string the measurement should be ruffly 1.7 to 2mm of relief now comparing this to loads of other measurements for relief this seemed like a grand canyone if a gap.was interested to see what you guys thought???

That has to be a typo. They probably meant 0.17 to 0.2 mm .

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The time has gone, the song is over, thought I'd something more to say.

Yeah it must be. Awfull to think how many budding home guitar techs there are out there Reading that then going and wrecking there guitar necks because of this