Slide the pink slotted tungsten bead onto the size 10 jig hook and start the black 12/0 thread right behind it. Hold the bead forward with your fingers and build a thread dam behind it so it cannot rock, then work back to the bend.
Prep a sparse bunch of Black Marabou — this is a small fly, so far less than a traditional Woolly Bugger — ripping off the straighter, non-fluffy tips with a nail. Measure about a shank length, set it with two or three loose wraps, check the position, then lock it down.
Bring the thread to the front, bind the marabou butts along the shank and snip the excess.
Tie in one strand of pink flash along each side of the tail, left slightly longer than the marabou, and tie in a further strand at the same point to serve as the counter-rib.
Build a slim, even thread underbody — resist piling on wraps, the body has to stay uniform.
Bind Pearl Flashabou in on top of the shank and wrap it forward in touching turns to just behind the bead, then take a few good securing wraps and snip the excess.
Tie in a single black ostrich herl right behind the bead, take two or three wraps in place at the front, then palmer it back to the tail in evenly spaced turns, keeping tension on the herl.
Holding that tension, catch the herl with the counter-rib: one full turn at the back, then wiggle the rib forward through the ostrich to the front with one full wrap in front of the bead. The counter-wrap is what makes the fragile ostrich durable.
Secure the rib and clip the excess, snip the remaining ostrich at the back, then lay UV resin onto the thread and spread it rather than dropping it into the neck. Whip finish three turns, nip the thread off and cure with the UV light.