Zak,Uh, I did write 'increase bolt cycle time' and that isn't what I meant.
I did mean decrease bolt cycle time, not increase it.
"Propely installed" means a heat resistant sleeve retaining compound applied, barrel properly dimpled, screws torqued in place and gas block properly aligned to the gas tube port.
Seeing a gas block fail in competition does not contradict anything I said, it just means you saw a gas block fail.
I didn't see this incident and have no comment as to why, or how, that particular block failed.
Read the whole post and you will see I personally would, and do, recommend steel gas blocks over aluminum.