Wow, keep up the good work. How's that Hydra 120 holding up? (cuz i fried mine [:'(])
This should maybe give you some ideas about using a feigao XL.
http://www.finedesignrc.com/
Go under FDM hulls and you should find a converted Black Jack 26. (the url of the FDM hull list isn't currently working for me right now)
I'm thinking of doing this hull design in the future sometime.