The main (and only)reason I did it was to prolong the life of my tail motors by splitting the current. I dont know that it helps you fly better though.I also use the 11V lipos so if you fly a lot like I do then youre gonna burn a few motors over time.Some guys are only getting like 10 flights off a tail motor.At 10 bucks a pop this can add up. So if youre looking to save money in the long run the dual motors is a good way to go. To set up duals you need the special motor mount. The one I bought was $20 I think at helidirect but Im sure other places have them also. Then add another $10 to get an extra tail motor. So for $30 you now have a dual tail setup with a little soldering. So just look over what I just said and decide if you really need them or if you can live without em