@eroica, hello fellow overbiter !! Please post some pics so I can get a better understanding of whats going on.
It sounds like you have a number of things on your plate bugging you. Have you seen A/G work? It is quite the trip to meet them, do you like their work ? You could contact them via phone and see if they would be willing to do some kind of skype/phone consult, but from my experience they like having you in office and playing with your face etc....
Emmm the thing is our faces, even if we balance the jaw lets say there could be other components that are over or under developed that make this a bit harder to calculate...
Consults dont hurt, but it would be challenging if you decided to move forward with them as they like to see you every month for like 6 months post op and so on.
You could just go to hear what they have to say, get their opinion and bring some of their cephs and works ups back with you home.
Honestly as much as I hear the NHS being a pain to some, the fact that one doesnt have to worry about the costs of surgery is surreal !