If you want this aircraft to perform, the wing must be 100% accurate. I suggest that you contact the BEST and MOST EXPERIENCED foam wing cutter on the planet- BOB HUNT !
Bob's Ukie Stunt resume is extensive (also was an excellent Pattern flyer awhile back). Former editor of Flying Models and Model Aviation Mags.
Reach him @ Robin's View Productions( 610-746-0106). His shop is an easy interstate drive from NYC- about 1 1/2 drive in Stockertown, Pa.
Tell him I sent you.