i donīt think there is any difference in construction between isonic 2011 and 2012.
Itīs not an "eggshell" its carbon fibre fabric, epoxi, polyurethane (sandwich) glass fibre, and Extruded polystyrhene.
2. I ride a isonic 127 carbon with a chameleon 36 and itīs way to small in lightwind but works without spinout with a 9.3 sail, itīs a lot better when powered on a 7.6, but then the board starts to feel too large.
Check out lessacher duo weed formula, i think it will work better for light wind.