I read your post and followed it except for the wrapping after 4 hours. IDK I still think this was the devil brisket. It caused trouble from the time I brought it home lol.
Total time in the ice chest was 3 hours. MAybe longer would have helped.
And I forgot to mention after taking the burnt ends off the egg I put them in the micro wave until everything else finished. Everyone was in the pool swimming when I pulled them off. Well I forgot them and the wife found them this morning.
Normally that's the first to be eaten. Oh well the next cook can only get better