Rocker Arm help

There is a member here who had a pretty stout stroker running Speedmaster heads who had a rockershaft hold down bolt(s) pull out and the actual shaft broke as well IIRC. Blamed it on the helicoils failing along with use of bolts instead of studs. I noticed on a set that passed through my garage a couple years ago that there was reduced oem bolt engagement into all the stands (not just the oiling stand in each head) as the threads were down in the bores of every stand. Throw in saddles incorrectly machined and it’s a recipe for disaster it seems, more so with higher spring pressures, lifts and rpm.