My examiner gave me a mild wringing out before the test with questions about the test a/c:landing /t/o distances,w&b,fuel consumption,tyre pressures (!!).
I had to present my plog (for the Nav part) showing the route,fuel burn,CG before and at end of flight.Try to get the regional and forecast pressure (from ATC).Mark max drift on your chart-handy for your diversion.
Unless you are a super cool type,your head will be a bit stressed and a good examiner will allow for that.
Ref the test itself-I found it much better to do the Nav and Handling parts as 2 flights.To do it all in one can be quite tiring.Did my Nav in the morning and Handling in the afternoon.Only got a partial ( crap PFL) but retook it after a bit more training.I think PFL's have been responsible for quite a few failures so make sure you have done some recently.
Come back and let us know how it went
MM