Ours have been restricted to .029" and not any issues with rockers or springs. In fact the original rockers are still in the 525 with well north of 1000 passes onthem .Only replaced springs between freshen ups once usually at 200-220 laps only to error on the side of caution. They always pulled well when taken off honestly. Never broke one either. Had 1080 open pressure, usually were at 1045-55 when pulled. There is still a take off set on my Camaro now that's street driven and raced on occasion.