HA! That, somehow, does not surprise me.

The impression of their attitude toward their stud mounted rocker setups on Magnums is that it works, its a relative bargain and you've got it as good as its going to get, add a stud girdle if you're regularly above 7K. If you don't like it, buy one of our shaft setups.

The only way I can see to get decent geometry is with an adjustable guide plate, or, cut and weld the ones that are available, and even then I think machine work would be needed to get it perfect.