...and I can't find the quest code for the "Unexpected Entropy" quest that grants such a module.

What predicate should I use to make a module only available on hero ships?

Ah, I think I found the appropriate predicate by grepping through everything looking for "Hero". The answer is "ClassShip,ShipRoleHero". I guess the ClassModule<foo> are compounds, and unneeded for singletons.

the simulation descriptor for that only displays the visual effect, you need to add a prerequisite

OK. I was able to get the multiple root modules on a root ship working - it was actually working, my counting was off when looking at the speedup from rootships + leader with root module.

Thanks!