Just a thought, but you always honour the commitment that you made before undertaking that training that necessitated the RoS. I know its a radical thought but surely since the forces have paid through the nose for you and the training received they are entitled to their pound of flesh.
Suck it up man and do the right thing, stop whinging and get on with it. You can always go fly for virgin afterwards.
Please dont reply with whinges about this opinion - just assume that I've ignored them and move on.