So I need some help. I've been sending my ship to sector 7, alone and in combination with other locations, for almost 2 weeks now. We are rank 30 and still have not unlocked sector 8. What gives? Are we doing something wrong? Please let me know what routes you took to unlock sector 8 and what your log message said if you can. Thank you!

Parts:
Enterprise Hull
Invincible Propellers
Enterprise Forecastle
Enterprise Aftcastle