I tye 3 patterns main one I use is the same as listed by many above: curved hook, homemade dubbing blend, mono rib, plastic bag strip overback. Dubbing blend is teased out and trimmed for legs. Sizes 16-20. No weight though. Supposedly weighting a curved shank hook makes it flip over-can anybody confirm this?
Other two patterns:
Microscud: 22-24 curved shank, ostrich hurl body. FFP olive sparkle yarn shell. Extra simple for small fly.
Atomic Shrimp: size 14 with weighting wire for an achor fly. Scud dubbing blend body, palmered ostrich hurl, fine wire rib, and pearl film shell. Very flashy attractor.