We run 50's. These tyres are 3 seconds a lap faster at Phillip Island than A048...
Willing to bet you are getting over pressure
I start at 21 psi front, 18 rear, I know guys who start at 16...
30 hot max, OK at 28 but gone at 32.
Less camber and stiffer spring (or ARB) and you can drop another second. What is more I have done an 8 lap race at PI and every lap except the first was within 0.8 of a second
Edit, you are in Tas so Traction are your Yokie Motorsport tyre agent, call them and ask what they recommend