I did stage 2 around a year ago and did pretty well on the aptitude tests. I used the PILAPT software to prepare which you can purchase online. Apparently cockpit web is good prep for the tests aswell. Do a google search and you'll come up with both. I passed the aptitude part but failed on the maths! Practice lots of fast long div/ multiplication with decimal points aswell. Check on your fuel calculations and conversions aswell. It may have completely changed in a year but thats my experience.
Good luck
