Ditto -- for trout I fish almost nothing but various soft hackles in the 14-16 size (I do a few 18s too) and they nearly
always produce, but I always carry zebra/blood/olive whatever bead midges in the 20-24 size. I usually have PT nymphs (well...my cheater version, which is a lot like a "frenchie" I just saw) in 16-24. I figure I have a chance to catch something with those guys -- if I don't catch, I assume it's me and not the patterns.
For #20-24 PT nymphs I've seen a lot of of folks just tie the tail in like normal and wrap the rest of the PT fibers up to the bead and tie off (with wire rib, or hot spot collar, etc.). No need to clip and tie additional PT fibers in, or bother with herl or anything. They're pretty easy to tie that way.
Sometimes it's good to know that when fishing sucks, it's
you who sucks.
Gene