thats interesting, so your gonna do the sam as me, its nearly impossible actually(if not talking about the cost) once your finished with putting all the 3 motors with the servos so thepitch down and farward, ther is one diffecult problem: Sholdnt we have independent FULL control of every fan, WHy?, cauz you have to balance it in the air , now how are you gonna solve that ?? really wanting to share your idea

with too many things like thrust and servos( did you think about how many channels we need 9 isnt enough) on each engine its extreme and diffecult, to controll..