One thing about a stunt model, you get out of it what you put into it. By all means, use a template. I have seen Twisters with absolutely un-shaped 1/2" square sticks in the leading edge and they actually flew acceptably for the person at that time. But a nicely shaped leading edge with no lumps or bumps looks really nice and really nice looking always flies better!
Type at you later,
Dan McEntee