I'm not at all familiar with the airspace around Archerfield, but for other reasons would like to be.
What I don't get is: Having found what looks to be the Lake Clarendon VFR route towards Archerfield around the top end of the control zone and starting to follow it in, why he suddenly left it, did a 180 and subsequently lost all SA. After skirting around a thunderhead or two maybe? Or is that only an outbound route from Archerfield??