i have a quick question about the E-Flite Piper Pawnee. i've never made any modifications, even if they are optional mods from the book, before, so i want to make sure i have everything right before i start cutting and make a mistake. i'm adding the flaps, but there are no measurements in the book, and i'm not too sure where i need to cut the ailerons to make the flaps, or where i need to cut out for the flap servos. does anyone have experience with this model that can help me? i'd be very appreciative. thanks.