Thanks for the quick reply, tbh the super isn't a huge concern because they'll tax me 65% of that when I leave here permanently so my main concern is making sure I don't overpay on my PAYG or that if I do it can be claimed back when I do my tax return.
The guy I spoke to at the ATO seemed really unsure about whether I can claim back the difference between the 15% and 32.5%, so I'm hoping someone can shed some light on the situation!