[dogscoff]

Redoing my numbers:
Year=300 days (10Months of 30 days)

Crossing a system in two turns (60 days)

2000 Km/sec or 0.66% of c, not 3%

This is just the average speed though - there ought to be accelleration and decelleration factored into that (even though SE4 ships can change direction completely mid-journey without any apparent need to slow down).