So I finished the bicorn construction last night. I still need to trim it up (and line it) but I'm pretty happy with it. I also have to figure out if I'm wearing it athwart (side to side) or "fore-and-aft." I'll take some pics when the trimming is finished and let you help me decide.
Since it is such an odd hat I took a picture of the side view before the final side brim was added so you can get an inside view of how this whole thing goes together.
It's a hat that needs quite a bit more steaming and shaping of the buckram than I'm used to get the swooping shape it needs.