[GibsonSlash]

When I got it the saddle thumbwheel on the treble side is turned clockwised until the end (lowest action).

Now, it's a bit higher, but only string 2B has buzz, weird!
Even if I unfret it, it still buzz, worse starts from fret 7, it sounds like the buzz comes from before the freted area.

How can you get 1.5mm on high E without buzz? will you turn the saddle thumbwheel to the most clockwise?