Hi Guys, On the Gretsch Guitars webside the setup specifications say the following: "Nut Height (Without Zero Fret) Bass side .020" treble sie .018" My guitar does have a Zero fret it's a 6119 (1961 Vintage) and i also got a 2001 one 1. what should be the fret height? I assume the question should be: What should be the gap between the first fret to the bottom of the string on the Bass vs the treble....is it what you specified above? .02 and 0.18? if so what does it mean without zero fret? 2. should i hold down on 3rd fret while measuring?