My personal experience.....
Your Air Force has paid a lot of money for your expensive training and they expect a return on their investment. As a result they will use ANY means necessary to keep you from leaving. They will stop you leaving early because of the precedent this will set.
My advice is to get a good legal-type with experience in the field to find out if it's been done before. Be careful about talking to your Air Force as they WILL LIE to you and if you don't get out it will count against you.
This may sound pessimistic but it happened to me.