Neck on 3 string is a little tilted to the side in relation to the box.

[Robbie]

Ok. I have a string buzz on the low (thick) string when open and all the way up the neck. The other 2 strings are good and play clean when open and all the way up the neck. I noticed that when I look at the guitar along the length the neck tilts when I screw the neck to the box. My thinking here is that this is what is causing the one string buzz. I wanted to check on your thoughts before I take the guitar apart to check the neck. This is a 0 fret electric 3 string CBG. I used a jumbo fret for nut. Am I onto the right idea of the problem? Thanks in advance.

[Robbie]

[BrianQ.]

Maybe post a few pics? 
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[Taffy Evans]

Hi, first I would check the strings contact at the bridge saddle to see if it is buzzing there. If it was buzzing at the nut it would go away when fretted. You could also shim the bridge under the offending string, to raise it off the fingerboard, to check if any contact along its length. A buzz along the whole fingerboard often indicates bridge saddle, especially if you have grooves in the saddle.
Taff

[Taffy Evans]

Hi again, I forgot to mention, that to stop the neck from tilting I would either remove wood from the high side to make the seating surface level or, shim the low side to achieve the same outcome.
Let us know what you find.
Taff

[ILL GREEN]

You'll know if the neck is tilted to the sides when the strings have a cut angle at the bridge. Also if one of the strings are further out the fingerboard or further in.

As Taffy said, buzzing is common to the bridge setup and fretting, so check those areas first.

I had a tilted neck for one build and the bass string would fall off the bridge during playing.  Tried many styles of bridges but same result. This one can't be realigned because in my green days, I epoxy'd and super glued the neck

[BrianQ.]

I agree with Taff, it’s probably on the bridge or nut, may just need a little fine tuning of the string grooves. Tread lightly, it can get away from you real fast, depending on the material? Kind of hard to figure out without seeing it tho?