I presume you already know this, but i fyou lose or damage the Aerobird you can buy a fuselage. You don't have to buy the whole package.
http://shop.store.yahoo.com/hobby-warehouse/aerac.html
http://search.ehobbies.com/?AID=9928...tal=232;page=1
above are a couple of sources on-line. Your local hobby store can also order parts for you if they don't stock them.
If you are flying the 7 Cell, did you adjust the CG as I suggested in my post so that it is not so nose heavy? You can fly it slower and more evenly if you do the adjustment for hte 7 cell CG.
I move the battery depending on whether I am usign the 6 cell or the 7 cell.