RE: Hawk pro head links?
You can go on the century website, and they have the manual for the hawk sport online. Download that manual as it contains a significant amount of information that the pro manual does not have. I don't know who made the manual for the pro, but I agree that it stinks. The sport and pro are quite similar, so you should not have any problems with it. As far as the linkage lengths go, even in the sport manual, the dimensions given are not quite right, but a good start.