I finally managed to speak to someone in the know from ctc. They said the one try only pat test is only for d/e pilots. In anyhow, I suspect full details of the path ahead are in the contract you will sign and so you can make a more informed decision then. I'm still going for my selection and (fingers crossed if i pass) and i'm still not happy with qatar, the normal 'wings' route is still there with less risk of losing everything and what seems a good chance of still gaining employment.