ya never know till ya try, but that try might cost ya one, been there done that, Im 17 and built my own design thats still witing ti be test flown. so never stop trying idea, just onsider that maybe it might be better to leave it alone. but this rocket idea is neat, but im not willing to try it, all my planes are over powered allready, no need for more thrust, and the smoke, ill buy a smoke sysytem, but cant get the rocket noise, if ya do it, post some pics, i find it interesting.