Two questions:

1.) For modifying naval unit accuracy, should I be fiddling around in unit_stats_naval_crew_tables (there's a core marksmanship value but nothing to indicate what TYPE of weapon used) or the actual boats in unit_stats_naval_tables?

2.) To increase the lethality of ranged units, I've increased the marksmanship stats... but can I also increase the actual damage of the missile units (with the idea of seeing arrows and musket balls with a higher kill rate)? I played around a bit in projectiles_tables, playing with marksmanship, spread, damage and penetration... but doing so ended up causing my game to crash, so I must have been doing something wrong.