Slide the tungsten bead to the eye, then wrap 10-12 turns of lead-free wire behind it to load the anchor with weight and shove the wraps up into the bead.
Start thread behind the wire and lay a base back to the bend.
Tie in a strip of thin skin (scud back) and the gold wire at the bend.
Dub a fat, tapered abdomen forward two-thirds of the shank; keep the belly full so the fly rolls hook-point-up on the drift.
Pull the thin skin over the back as a shell and bind it behind the bead.
Counter-wrap the gold wire forward in 5-6 open turns to segment the body and lock the shellback, then helicopter off the tag.
Wrap a short fluorescent-orange thread collar behind the bead as a hotspot, whip finish, and glaze the shellback and collar with UV resin.