I mean, cutting 20 minutes is nothing to sneeze at, but I'd pump the brakes on the whole "who taught me wrong" thing. Sometimes you just develop habits over the years, doesn't mean whoever trained you was clueless. The old guy's advice worked for you on that shell, sure, but every job and every tool rolls a little different, so what saves time one day might not the next. Take it with a grain of salt and just be glad the hydro passed.