Keith
It shows that the Arrow V3 can take 5v. So it should be a direct replacement. I've looked everything over (I have an Arrow V3 and my bird in front of me). Here's what you do. Take the canopy off and remove your existing camera, take note to the way it plugs into the camera. The power (Red) wire will be to the outside of the camera, then the ground (Black), then the video (White). Take your new arrow V3 and plug your old plug in exactly the same way. I just checked and it will plug in without modification. Just be very careful when you plug it in the it goes into the first 3 pins on the Arrow (VCC, GND, VID). The existing connector will clear the 4th pin on the new camera (I physically checked it. Just use caution to make sure you get those first 3 pins. Once its plugged up and before you start putting everything back together verify that its working by setting up your goggles first and then put power to your bird. The video should come up pretty quickly in your goggles, if it doesn't, unplug it right away and let me know.
Jerry