It was designed for dual servos. How could this possibly be detriment in wt & balance. Don't you think the mfg thought of this. They have built a few of these by now ya know and they have worked fine. Case in point would be the one MinnFlyer built for his review.
Use dual servos & Y-harness, forget the other Mickey Mouse stuff. If absolutely necessary add a reverser but I don't think MinnFlyer used one.
Good luck.