I'm worried that my fretless Acacia 4 may be developing a crack at the base of the neck. The neck is 3 pieces,with 2 stringers and a line is there running on a curve from perpendicular at the treble side to parallel to the grain on the bass side. The whole line, which can be felt very slightly to the touch for about a 3rd of the way, runs about 1.5 inches. The whole thing takes place within 2 inches of the bolt-on joint. I don't know if the wood has just dried out a bit (i didn't get to play it for 3 months and it sat in its THICKLY padded gigbag in an abnormally dry fall) or if it's some sort of stress crack that's only taking place in the center laminate. The centerpiece is either walnut or bubinga... i think. The outside pieces are both wenge. If I can, I'll get a pic, but I'll have to borrow a camera.