As a RM NCO you would be very welcome in the AAC and your age is unlikely to be a problem. You are right that it is SO2 Selection that you need to speak to, an affable silver haired retired officer who runs all the selection boards and administers you going to OASC. You might have to be a bit canny about cap badge issues, will the RM let you do the Army pilot course as a RM or will you have to transfer to the AAC in order to do the course? I would recommend trying to a remain a RM until you get your wings, at that point you would probably have to transfer to the AAC. If you transfer before wings and you fail the course you may find yourself in a new life as an AAC groundie - probably not what you are after. If you cannot get hold of SO2 Selection try to find SO2 Flying Training in SAAvn. Cannot remember any numbers I'm afraid. Good luck.