Accumulate 4 demerits on reds and you're out.
Also, the 10% thing is a crock of shit.
Most HWP will give around 10KM/H on 70+km/h zones, but they don't have to.
ADRs are written such that the 10% is no longer +/- but it is now that the speedo can only read 10% higher... IE, you're travelling at 100KM/H, speedo can read from 100 - 110KM/H
years ago it used to be able to read from 90 - 110KM/H... Not any more.
If you were only 5 over, you're probably safe, I've been through most of the cameras in WGong 5 over and never been done.