For the 3 rudder fins the only thing i can recommend is cutting them off at the bottom and using them as templates to cut out some more out of depron and sticking them on. By electricity adjustor do you mean the speed controller case?? If so it may be that you just have to repair it as best you can. Could you put up some pics? Am going to go fly it with new battery in an hour will say how it goes. Have you flown yours before?