Speedmaster Stainless Rocker Arm Issues

My last LA builds used Hughes and T&D rockers and I shimmed them as necessary, so I am well aware that rockers are not just a bolt on and go item. However, I am just wondering how much "shim" per say is needed with these rockers and a dual valvespring setup, as I see it there is a big difference in shimming for geometry vs shimming for interference..