Andrew I was using the one from down your way, it developed a major leak on the dyno. Not actually sure whose the new one is.
I actually preferred the section from Broke to Wollemi, it is very tight, narrow, and no speed advisory signs to give each corner away The old pac was the most painful, it is signposted 60 from Calga to Berowra nowdays
No doubt the speed limits will keep dropping on these "tourist" roads....enjoy them while you can!