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The lower leg fairings are definitely worth developing. Upright Mike at recumbents.com has experimented with them and I have used barn boots in winter as well. The upper torso boat tail is also a proven design. The FIM limits its size on motorcycles and Triathlon sanctioning bodies have outlawed aero devices attached to clothing. A front aero water tank is permitted up to a given size. No ruling an rear water/food carriers yet.
The older gentlemen at the Vetter Challenge prefer a back angle close to vertical or slightly reclined. More progress is being made so check the latest post at craigvetter.com.
A bicycle fairing will be very similar in shape to the motorcycle fairing and 7/8 the size usually. The trick with a aero tuck is to have good fit and support of the chest and fore arms to reduce fatigue. I use a full face helmet with visor but a 'spaceman' bubble may prove undesirable when pedaling in warm weather. Anything over 30 mph (50kph) and I may install a lap belt plus skid plates in the fairing for my hips and shoulders.
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