Here is what I had in mind for the Whilock sheep minnow. These flies are tied to represent larger herring that arrive earlier in the year. Of course they would be effective later on in the year tied much smaller. The flies are tied on long-shanked Mustad hooks (34011's) sz. 2/0, and are tied bend-back style. Saw the flies in FlyFisherman and thought they looked good.
the flies are 6-6.5" long and when wet have a nice tranlucent appearance and maintain a nice profile.