Flipside,
Speaking amongst friends who have recently done Qantas stage 1 it seems that part 4, Diagramatical Reasoning has been changed a little in the last few months.
Instead of the " what comes next" they have replaced it with a series of symbols and shapes stacked in boxes. You are given about 8 different instructions which tell you how to manipulate the symbols and place them into a new order. From there it's just a matter of choosing the correct answer out of 5.
Best of luck