WPT Shooting Star avg. stk for structure?

[TakenItEasy]

I'm playing the WPT Shooting Star in San Jose next week. Anyone have experience of expected stack sizes for this structure:

Shooting Star structure

Basically it's 20,000 starting chips, 90 minute levels, Day 1 ends at level 10 500/1,000/100.

I'm looking for expected avg stacks at breaks or whatever other scouting info you can provide such as relative aggression levels etc.