Firecore Distributor

So I got one of them rev-n-nator boxes. But I'm currently running an unknown reman distributor. I'm looking at the firecore setup from Mancini, as recommended by rev-n-nator. I emailed them to ask a few questions. As I'm at work when they are open. But I haven't heard back yet. I would have called on saturday but I was too busy up at the Outlaw show in edmonton. Anyone ordered one of these units, or got one? I'm mostly curious about the mechanical advance. Is it adjustable? Does it come with the spring/weights I need? Or is that a whole nother separate deal? Do they give you any idea of what springs/weights give you waht curve? Or is it a try and find out deal?

Appreciate your help fellas!