Request: troubleshooting + guitar setup

[asilayamazing]

After long searching and googling, i found out my neck had too much relief, causing the same effects as not enough relief.

I straightened the neck again, leaving slight relief still, and the buzzing as all but gone pretty much.

But now i have a new problem. Intionation on my heaviest string (66gauge in low g#) is too sharp at fretted 12th fret, even though the string saddle is at the end of it's thread in the right direction.

Can this be fixed with a heavier string ? (a lot of people on this forum seem to use at least a 68-70 for g#, im using 66)

cool thats good, so you adjusted the saddle. does it go xsharp then return to normal after a second? cause then yes a bigger string should help.