- Vibration sound
- Squeak when light pressure is placed on top or back
- Non-symeterical arching on top or back (lump to one side)
- Excessive top bellying
- Top Rotation (severe belly behind bridge with a dip in front of the bridge)
No need to point this loose brace out to you.
A quick peek inside was all it took to find the buzzing culprit on this guitar.
But not all loose braces are as easy to spot, in fact, some loose braces fit so closely to the top/back that it's hard to see a gap visually.
I like to run a thin feeler gauge along the glue line of the top and back braces to ensure we aren't missing a loose brace that visually looks unsuspecting.