I was relocating several clamp-on rod holders this weekend and something was just not right. The holders on port/starboard vertical pipes were in the exact location at the exact same angle. However, when I placed a rod in them one was closer to the hardtop edge than the other. Steping back and looking hard, I could see the difference. I got the tape measure out and sure enough, there is a half inch difference from the hardtop edge to the vertical pipe one side verse the other. My factory hardtop is bolted on crooked!