+1 for looking good.
I agree with fender3x about tiny flaws. I also use the three foot rule - i.e. if you cannot see the issue when greater than 3 feet from the guitar, it is not an issue! Working with wood and hand tools it is expected that there is a tolerance of 1mm or more.
Neck, nut and fretwork are really important parts of guitar kit building. It is worth getting some of the tools to do this well (especially if you are planning more builds). Notched straight edge, Levelling beam or radius block (or both), fret rocker, crowning file, string action gauge.
String tension - what gauge strings are you using? Maybe lighter strings would feel better!