Alan,

I had the same problem at Templestowe which is very similar I have been told to Whalan - Huge amounts of grip.

I found that going harder springs and 50/40 weight oil fixed the issue. I was running 19lb Frt & 17lb rear springs on the 08PHI and when the track warmed up I went to 22 & 19 lb springs.

With a grippy track sometimes you have to try a few things outside your normal thought process. I would also suggest trying different droop settings. maybe 4.0 & 3.5