Ask for the examiners weight when you book the test and have the W&B done in advance, or at least most of the numbers prefilled out. How about getting things like the weather and local notams already prepared and printed before the test starts? Don't know what the Aus cpl test requires but presumably a VFR flight with a diversion, departing from your home field ? So you can prepare perf calcs for the home runway if you need them. Etc.