Based on Shane Stalcup's design; subbed poly yarn wing for Medallion sheeting. Tied here as a rusty spinner; change color/size to suit your needs.
hook ? Dai Riki 320 #14
thread - MFC 8/0 rusty brown
tail ? hackle fibers golden badger
body ? goose biot rust
post - foam cylinder chartreuse
thorax - dubbing rust
hackle - golden badger (oversize by 1)
wing - Congo Hair dun
Part 1
mash barb, start thread at 2/3 mark, wrap to point above barb, create bump
strip hackle fibers, even tips, measure (hook length); tie in/trim
tie in (moistened) biot, notch-side down, wrap to 2/3 mark; tie off/trim
tie in foam cylinder
tie in hackle, shiny side out
dub thread/dub rear half of thorax