Slide the 1/8-inch copper slotted bead onto the jig hook, seat it against the eye, and start the brown thread behind it.
Tie in a length of fine silver wire at the bend, folding the tag back over itself so it cannot pull off the shank.
Tie in copper holographic Flashabou and wrap a smooth, bright underbody from the bend up to the bead; tie off.
Lay a sparse strip of UV2 Seal-X olive/brown between the thread and the wire, then spin the wire into a dubbing brush; pluck and tease the fibers out with a wire brush so there are no lumps.
Wrap the brush forward in open turns so the copper still glints through, preening the fibers back with every turn; finish with a snug turn or two behind the bead.
Tie off the wire, cutting it with the inside of your scissor blades, and take a strong whip finish behind the bead.
Brush the whole fly back with a stiff wire brush until the fibers sweep rearward and the copper underbody shows through the translucent collar; add a drop of head cement.