Solution found for stability

Well the stability problem induced by 2 moveable engines in charge of both the balance and propulsion was resolved in an elegant way. Actually the movie does point out to the fact the MAIN propulsion comes from the back too. With 3 points to lean on there is way less issues, and a redundancy in case one of the engines stops working. Next powered flight will be in a week. *Possibly* without a cable tether.