Ive seen some crap posted on PPRUNE but this thread is full of it. If you choose to join as NCA then you are streamed post the generic course. The streaming process is based on many factors that stem all the way from basic training at RTS for those recently from Halton, to how one has performed on 55 Sqn and OACTU and obviously what PMA 55 needs to fill at the sharp end. At the end of the day , piss people off at Cranwell and you'll not get what you want, (there are plenty have done this!!) cos you probably aren/t good enough for it!! Keep your nose ,clean work hard, play hard !but most of all be professional and always strive for excellence. Good luck , remember about 1 out of the 10 who ever think of NCA make it to a SQN.