I have a feeler guage set and the range is: .0015 Inches (.0380MM) - .035 Inches (.8890 MM) My questions are as follows: 1. When using feeler guage, do you select one guage to measure a gap, or do you "stack them up" to the measure you are taking? For example, if the measure is .035, do I stick the feeler with .035 into the space, or all of them up to and including .035... 2. If I want to measure 7/64ths Inches and I needed to convert it to a decimal to find the matching guage, would .109 be the right guage to match 7/64ths Inches? 3. Do you put the Feeler Guage on top of the Frets or the Fretboard Wood for making measurements? I would appreciate anyone who can help me confirm that I am doing my measurements correctly. Thanks Big Time!