Hi!
Regarding the my questions about the motors and how to mount them, I was watching again yesterday, the video of the anycopter build (http://www.youtube.com/watch?v=x_bDJ-esG4A) and I spotted that David mounted his X quadcopter with the same motors as mine and mounted below the plate (with the prop hub). So I assume that there is no problem doing so after all
Anyway, if it turns out to be any issue, do you think this motor can replace my Park300 1380Kv?
In relation to power and speed, these motors are very similar. The park300 is speced to spin slightly faster, but I doubt it's noticable.
I don't know if the collet adaptor from the park300 can be used on the hextronic motor, but there's a good chance it can.