How far have you gotten on endless mode?

I am currently on my 11th sector, after facing the Unknown twice.

I chose the BSE Harbinger as my command, and two BSE Valiants as my escorts.

Between the ships I have
6 death ray and 4 mega plasma cannons. All other facilities I opted for shield boosts. I have four shield drones and four repair droids in my hangars. I haven't lost yet and feel as though I won't until I choose to end it. I have absolutely everything maxed on upgrades as well