I finally tied a carnage! Carnage green drakes in both parachute and cripple styles. They don't look as good as Scott's (no surprise), but both caught fish, even without a drake hatch, and both floated great. They stood up well to several fish.
Now that I'm hooked, I'm off to buy some nylon bushings and build a gallows tool.
Scott - thanks so much for your fantastic carnage SBS's. I would never have attempted this style without your detailed photos and instructions.