It's gonna happen.
Join Date: Oct 2015
Location: Clark Fork, Missouri, Clearwater, Central PA springs, Lycoming Creek is home.
I fish old school palmered marabou flies on the OP all the time and I've caught plenty of fish on them, red and orange, orange and pink, and black and blue being my favorites. Sometimes I string them out so I can use a smaller hook. On a Waddington, they sink just fine, especially if you don't overdress them. Of course, Intruders are fun to tie and they certainly work, too. Plenty of folks pointing out the mass-mass angle. It certainly has made a difference casting big flies with my trout set ups. I'd just say, don't think you have to throw a big intruder to catch an OP fish, especially if you're the 4th guy through the run where everyone is chucking giant Intruders.
"Science is magic that works." - Kurt Vonnegut