I just installed my Tarot and it works well. You need an adapter plate to attach it to the Phantom. I have an extra I'll sell $12 shipped. Right after I ordered that simple plate, I found another that was more long to which the FPV transmitter could be attached (hence the extra).
Putting it together was pretty easy. The control board is the last piece to go on. I just got two JST plugs (male and female ends). One I attached to the aux line under the phantom and the other to the gimbal.
Make sure you never plug it it without the camera in place. Also, turn on the camera and start recording before you start the system, otherwise you'll be fighting against and putting force on the motors.
Phantom start sequence.
Install, turn on, and start recording the GP camera.
Plug in the phantom while on a level surface.
The gimbal light will be a solid blue once it is ready. Never push against it once it is powered.
You shouldn't have to take the Phantom apart unless the aux line has snaked into the body and you cannot get it out with tweezers.
I have mine set up so I can take the plate and gimbal off with one front screw. I've epoxied 2 button snaps to the plate and Phantom. The four snaps and the front screw hold everything in place.
If I just want to fly the system without the weight, just to show it of or play around, I merely have to remove the front screw and then lazily pry the plate off near the snaps, instead of having to take it apart every time.
Also, you'll need some kind of landing leg extension, or new landing system as the gimbal will hang too low and it will get hit when you land.