I built that from the kit, which sadly the morons at Horizon discontinued along with the kit version of the Capra, which I had intended to build next. The Ryft kit is one of the best kits I have ever assembled. It doesn't do well driving around on flat terrain. It loves to flip over. We don't...
You can share videos here. Just post the link and it will embed the video into your post.
That Fusion Pro has the FOC technology built into it. I have read about it, but didn't really understand it til I watched this.
Sounds like a good plan. That's the way I would go with it.
I don't know how the micro servos are setup in the Capra, but I know on our Ryft build, using any other servo besides the seriously crappy Spektrum one created a lot of difficulties trying to find a servo saver setup. I ended up having...
The Castle 10A BEC is what I would get for it. You will also need the Castle Link programmer to adjust it.
I would just leave it stock until you are ready to upgrade the motor. You might consider the QuicRun Fusion Pro FOC 2-in-1 motor/ESC. I hear a lot of people bragging about how good that...