Hi paul,
I did mine in June and spent hours trying to get answers on what to expect etc etc
The long and short of it is.... If you prepared well you will walk it
If your instructor says you will be fine then you WILL be fine remember he/she prepares people everyday for this and most certainly would NOT send someone who isnt ready!
Relax and enjoy the experience it will definately be one you will never forget!
My examiner had a can of coke on my test and it was bumpy as usual and he had real trouble drinking it.... When it was over and we got out he did the biggest burp i have ever heard! (he apologised and said he had been holding it in for a long time Haha) makes you realise they are humans!
Passed and had a bloody good laugh for days after.
It is a bit long, i did nav first then stalls etc it was so choppy and hard to keep height (sometimes jumping 100feet!) By the time i finished the nav i was considering asking to stop and do it in two halves... I carried on regardless and was glad i did.
Good luck mate... Im sure you really will be fine