I doubt my radio has that feature, but I will check. I am using a Airtronics mx-3s. The only thing that was keeping me from the 200amp esc was the listed dimensions, but it looks to be the same size just double stacked boards, so I might give it a try.
You will disable the ESC brakes to start with. The Y harness is ideal if you don't have a digital radio that has the channel mixing option. It's fairly simple the way it works. It's the same way it would work if you had it as a nitro.