After disappointing attempts on Mars last night from Brisbane, I gave up and waited until Saturn hauled his way up the zodiac to over 30 deg above the horizon. The seeing was marginally better (3/10) so I plugged in the ToUcam and did a bit of hit-and-miss tweaking of the settings in K3CCDTools.
Grabbed a 3 minute burst and stacked 170 frames out of 900 in Registax V3.
Not sure what happened to the colour, it looks a bit washed out. Hmm, it seems I have a lot to learn in terms of the fine art of webcam imaging!