I'm really buzzing, mate! My new Tokay has been exactly as you have suggested, but over the last day or two, I really think I'm making a bit of progress. He still postures, but the intent is not there now.
I've probably gone at this quicker than you suggested, but I've still done what you've suggested, which I think is absolutely right. It's vital to watch their reactions and respond. If they don't want to know, leave them alone. Lots of time, with careful movements is the key. Frighten them and you're back weeks.
They are definitely the best lizards!