One I can't see the wound clearly enough to say much about it as the photo needs to be taken from above the bird, you may have to try distracting him so that he is not looking at the camera. It may just be a little thing that you need to keep an eye on to keep it from getting an infection. it could be that you should let a vet look at it just to be sure it is not more severe than it looks. A good rule to have is when there is any doubt take the bird to the vet.
That is great that you are willing and able to change your lifestyle for your birds well being, some people are either unwilling or unable to do this and is the reason that I explained why the bird can't adjust to a human lifestyle. I really hate it when thing are such that I need to say some of the things that I said, because I do not want to be harsh or to offend anyone, but my entire reason for being here on the forum is to try to help people improve the lives of these wonderful birds. It sounds as if you understood my reasons, thank you.
It is good to learn that your bird is not clipped, she will be much better off unclipped and actually much safer as well. This is a good thing. Birds are flying sex machines so to speak and some of them also have a compact bolt cutter or wood shredder on the front of their face and they tend to be a bit destructive as well as messey, but they are one of my greatest sources of love and friendship. They are extremely intelligent, some say about the level of a 5 or 6 year old human child. Some of their intelligence is due to their ability to fly as when you are in the air you do not have a lot of time to decide how best to avoid crashing into things or deciding when you need to put on the brakes, air brakes at that, or in deciding how tightly to turn. There is a lot of problem solving going on while you are flying. In comparison to their flying ability, once they do it enough to learn how to do it, they are relatively clumsy and slow on the ground and flight is their primary means of escaping from a bad and or dangerous situation. In time and with some research you will learn that with a parrot, and most other birds, that this capacity to fly is connected to nearly every part of their body and has a major impact on how well everything about them functions from their attitude, to problem solving to their breathing and digestion to name a few things. For that reason clipping any bird without a valid medical reason is not good for the bird and in my opinion should not be done.
Lighting, full spectrum UVA/B : This is both simple and not so simple the specifications for a full spectrum light for your bird are a K Temp of 5000 to 5500 degrees, the CRI needs to be 94+ with a UVA/B output of 2 or less. This should be found printed somewhere on the bulb or tube depending on which you have. Do not trust the packaging as many of the companies just repackage reptile lights for use with birds which has resulted in some major horror stories for the birds exposed to them. The UV output of these lights is of little benefit for the production of vitamin D-3 and if the output is strong enough to allow the bird to manufacture vitamin D-3 then it is also strong enough to permanently blind the bird and to cause severe life threatening burns to its body in a very short time. For this reason my birds can not get any closer to my full spectrum lighting than 3 feet. Here is a ling from a different parrot forum that I am a member of that you really need to see and read. it is one of the horror stories that I spoke of, but I will say that eventually the bird did survive. Here is the link:
http://forums.avianavenue.com/index.php ... mp.149742/We will be happy to help you with any and all aspects of caring for your Grey be it the cage size or anything else that has anything to do with the bird Diet is usually a big one.