DS was 4.64kg at birth, but not a "big" baby, he was just really long, and had about a 38cm head.

You sound like you have done a lot of self education on these sorts of things already. Do you want to be induced, or are you hoping to avoid it? Does they type of induction make a difference?

I still dont want to have a medical induction, and after having a VB with DS, I don't doubt I can birth a "big" baby, but Im planning to start natural induction techniques, like accupuncture at 38 weeks. I figure that with more natural things, if they're ready they;ll come, if they arent they'll stay put.