Not an expert on the subject but did a bit of a research because we had cut and fill more than 1.5m.
1. One of the very strict council - Hills Shire allows cut and fill upto 1.5m, so I am guessing you will be alright without drop edge.
2. If you discuss this with your Sales person she will ask the back office expert to look at your plan from cut and fill point of view and offer you similar solution. I have read that this has happened before.
3. Every one building in NSW require an H1 slab because of the soil condition.
4. I would go for drop edge beams however in your case the cut n fill is less than 1m contact Sales and make an informed decision.
aaron2008 We're getting an M class slab. May I ask how you know that everyone building in NSW requires H class?
I was about to ask the same. We are getting M class slab as well. The class of slab depends on the soil grade. How can we genaralise it to H1 class for entire NSW?