This tek is new to me too, but I'll try to answer your questions.

1. Anything between 150-300ml as usual. I imagine you should keep pulling until next to no DMT is being left after evaporating.

2. I think, like STB, heating it won't really be necessary, as you're likely to pull a fair amount of fats/oils that you don't really want.

3. Lye is actually unnecessary, which is an advantage. I imagine it can be used but one of the bonuses of the tek, I believe, is the benefit of avoiding lye.

Yes you're correct, except I'm not so sure about higher yield, I've heard 1%, which is roughly what's achieved with STB and A/B