I personally think you are wasting your time, even if you enhanced your grades a bit you would still have little chance, i got 7B's,1 C and 1 A (presently doing AS exams) and im starting to get worried if theyre good enough for the high level of compitition in raf aircrew. By reading your post it sounds like this is a phase your going through and not proper dedication. Ive been wanting RAF aircrew since i saw the red arrows at 10. I recommend you seriously think about the implications of aircrew life and also dont niavely think you going to be a pilot.