Just to add what I noticed at the beginning of Era 3. The ramjets worked at first. However, when the dark nebula moved, taking clear space and bright nebula, the ramjets broke. Maybe that was a few days after the start though.
Fire, Fire, Fire;
Streaks of golden light,
Rays of cosmic waves crashing through still dead night.
Gifts of diamond rays,
Strewn pearls of days not measured,
Treasured gleaming quests fade through,
Absolute oblivion of infinite time of directionless direction.
And war died the day it noticed itself,
Peace, yet still dead, peace in the void of voids.
Upon a chance encounter,
The Life Tree came alight,
Strung with Golden-silver,
Dimensions of dimensions suddenly bright,
Collapsed under heavy night,
Reveal thy brilliant companion,
The Knife of Shadow-Light!
Strike down all that fight,
Yielding not to any might,
Striking down all in the deepest of night with their darkest fright.
Rays of cosmic waves crashing through still dead night.
Streaks of golden light,
Fire, Fire, Fire.