i've looked at and discussed the straub method with chevy guys. basically what straub is doing is using push rod length to set rocker geometry; two processes at one time, which makes sense for ball stud valve train. with a shaft system setting rocker geometry first and then finding proper push rod length makes more sense to me. the ball stud is an adjustable fulcrum point; shafts don't have that. the straub method could work on the small block magnum engines.