<<One you pass then you have to do the Cranwitz time and show you can be an Officer. Post that you then go to SFC At RAF Boulmer and do the ADFC this decides using simulators if you'll e a systems or controller or go back to Cranwell. >>
And this is the Beecher's Brook of the path to becoming an FC. OASC needs to get as many people with the basic aptitude to be both FC and an officer.
Cranditz makes sure they got it right and usually get the product squared away. It is the last hurdle at the School of FC that really tests your initial aptitude.
Do you know what is going on around you? Behind you? Do you have a single minded focus? If you said no, no, yes then you might struggle.