Yep I passed Stage 1, I have booked 14th for my Stage 2. See you boys there!
There is a lot of Stage 2 advice on the preceding pages Scottish-ghost, although as they are aptitude tests, I found a good sleep and a hearty breakfast in the morning set me up well (for a success) last time around.
Longer term, I didn't think it hurt to practice mental arithmetic in the lead up to the testing day.
Phil