Rainboe:
Near the end "we have a few minutes is there anything you would like to practice"?
Provided that you have already successfully completed the mandatory items of your OPC/LPC, it does not matter if you make an imperial horlicks of such a practice. You cannot be failed for that.
For example, a raw data ILS is mandatory for the skill test only and not for a subsequent OPC/LPC. Therefore you could make a bit of a mess of a raw data ILS and it should not affect the outcome since it is a training exercise and not a mandatory exercise.