Maybe a dumb question but....is there any other alignment mark on the camshafts and correspond place on the engine block instead of the arrow on the pulley and mark on the heat shield? I am asking this because on the right hand side heat shield on my GL1000 someone was welding/grinding something, probably it was broken so PO was fixing it, resulting in the factory mark being ground away, so there is a line scratched by hand instead of the factory mark. I was considering that with thrust and used that mark uncritically but now I started considering the option what if it was not made accurately so it could be say a tooth off? Anyway, is there any other reference to check it up? On some picture in the workshop manual it looks like the mark is in extension to one of the reinforcement ribs on the RH shield (the one that points out), in my case the line I have is also in extension to that rib but I don't know is that just a coincidence or a reference indeed. I did not find any marks on the camshaft itself, maybe I did not look close enough....Thanks!