So long story short, my uncle and I are newbie about multicopters. I would prefer RTF especially DJI Phantoms. My uncle somehow didn't like the look of the "super white and simple" transmitter so he has ended up purchasing Walkera QR X350 Pro. That was the story of a couple of months ago . Back to reality, I ended up selling my Phantom 2 Vision + to get a new Phantom 3 while he crashed all 3 of his Walkera QR X350 Pro for the more sophisticated look Devo F7 transmitter. Now, I mean totally no offense here but Walkera is a really sloppy little machine. Most of the time, my uncle couldn't get good GPS signal and he had to fly it manually. So, I guess that makes him a tougher controller in terms of "manual mode". Okay, I don't mean to get this post this long but I hope somehow that makes you guys understand on how these QR X350 Pro have affected his decisions later on. He now asks me to help him build a quadcopter from scratch as he has had enough of RTF bullshit. The first thing I could come up was to get a F450 or F550 frame of bonus kit to start building it. He ridiculously put all his money into 3 Walkeras and they all failed, he managed to keep so many spare parts that he insists he is going to build a quadcopter out of them. He also decides to use these "still good" motors on the F550 frame and only looking to buy E300 ESC. Also, he wants to use Devo F7 for his F550 that he is going to build. My questions are: 1. Are these QR X350 Pro motor compatible with E300 ESC? Last time I check I think they are 15A ESCs. 2. Is Devo F7 compatible with Naza M V2? Where do I look for receiver of Devo F7 on the bird side? 3. Which NAZA M V2 package I should look for?NAZA V2 unit w GPS, PMU and BEC or different packages? Please help me out this time as I have been flying RTF only and my knowledge is very limited to Walkera. Again I am sorry for the long post, you could look at my questions only I would highlight them all right now. My uncle is so desperate for a new unit right now and I would really like to help him out . I appreciate all your helps and please advise me on what I could do. Thank you all very much !