This fly gets its name from Martin guitars because of the shape of the foam body. After casting it a few times, it feels as if you're tossing a guitar onto the waters. It can be a bit unweildy to cast. But the very thing that makes it hard to cast is the very thing that makes it so effective on top of the water. The wide nose gives it an uncanny motion that drives the fish wild.
Hook: Mustad 79580 (4XL wet fly hook)
Thread: Monocord
Tail: Bucktail, green and white to match body
Body: Closed cell foam, flat, green and white (other color combinations are effective)
As with most foam body flies, most of the work is in sculpting the body. Start with the foam, cutting matching guitar shaped bodies from the flat foam sheets. Bevel the edges with the scissors, and cut out a slot for the tail. I generally make several sets of body sections, then clean up the shavings before proceeding. Wrap a foundation on the hook, tie in the tail, green atop white, tie off. Glue the body sections to the hook and each other with epoxy, making sure to get a good concentration in the tail slot to prevent the body from breaking free of the shaft. Allow to set. Color in eyes (optional) with a marker pen.
This fly works best in still water, as moving water tends to negate the effects of the shape of the body. Cast the fly onto the water and give an occasional twitch. The effects when worked properly are much like walking the dog with a stick bait. Take plenty of time with the fly. The less casting, the better. Let the fly do its work, as it may sometimes take the fish some time to make up its mind to strike. But given enough time, the fish seldom can resist. I like to cast and then sit, giving less presence to scare off the fish. But don't the restful posture catch you off guard when the fish strike.