You're in Melbourne. Go to Ralf at TruTrack (assuming they are still there).

The rear is adjustable for camber & toe via eccentric adjusters. Camber needs to be about -0.5 to -1.0 degree (from memory, original factory setting is something like -1.5 +- 0.25; this was later revised to 1.25 +-0.25). It depends how you drive but if you tend to drive sedately & lots of highway miles then it needs to be more upright. If you want to corner aggressively then you need more -ve but at the expense of tyre wear.

Golfs have rear toe-in (about 2mm +-2mm IIRC). Your setting depends on how lively you like the rear end. I tend to go almost parallel as I like a lively rear and it rolls along the road a bit better.

Get them to check the rear bushes, especially on the lower arms. Be prepared for the eccentric bolts to be seized in the bushes.

Everyone says get it done on a Hunter machine. Hunter are very good if you just want to set things in the green zone but ultimately the technician is more important than the brand of machine he is using. The best aligner I know still uses a 50 year old Simplex mechanical aligner.