I agree with Andy in terms of how tight it is once you get over 40 in relation to marks lost. There is a handful of marks at most that separates a 40 SS and a 50 SS, SACs included. My SS for Legals is evidence of this.
Also, MrIraq, I can't see why you wouldn't be appreciative of 2010 Legals kids giving you and others on here invaluable advice about the subject. We know what we're talking about, we've done the subject and you haven't. The reason I'm on ATAR Notes even though I've finished secondary school is to help people like you get the score you want, like people helped me last year to get the scores that I wanted. That is the predominant reason for the site's existence.