I have been tying a few of Roy Christie's Reversed Parachute Emergers. Having just received some Hend's wire from the Fly Tying Boutique (http://www.flytyingboutique.com/index.html), I have used the olive wire to rib this fly, creating a very subtle effect. I hope I have done the pattern justice.More of Roy's fabulous patterns can be found here,
http://www.danica.com/flytier/rchristie/rchristie.htm