(neck 10x faster is a awesome tip btw) .....
I am still thinking about a shim, because it would make sense to me. If the strings are higher than normal I would have to press much more down, which is also sharpens the tone.
[Blocked Image: https://www.dropbox.com/s/maztsh0dwz1q8nj/shimpng.png?dl=0]https://www.dropbox.com/s/maztsh0dwz1q8nj/shimpng.png?dl=0
You don't need to shim, Shim is to correct the action either way because the guitar doesn't or can't have the desired action (distance between fret and open string). Intonation has to do with the saddle/ bridge and sometimes the nut as far as I know.