7ate9 - I would say that everything has a fairly equal weighting however they will no doubt look at your suitability as a whole. I'm sure if you did great in everything else but scored low in one of the aptitude tests that wouldn't result in a definitive PFO. They are designed to be somewhat challenging and, as they said on the day, "these tests aren't perfect" so I very much doubt they will base their decisions solely on a poor aptitude performance. The only thing you can do is to try your best and to even get this far IMO is a great achievement. Good luck.