Word of caution - the change in end stop signage can make someone who is not familiar with the area get confused about which platform to board from - regardless of the name on the train, just make sure it's blue, and the platform signage aligns with the directions above.

There are station managers that should* help you (ymmv) and there are signs listing off the various stops - just read over those and choose the one that includes Rosslyn.

Hashtag goals.

My fiancé refuses to live anywhere without FiOS. It's been great anywhere we've been in the DMV. We use our own equipment. I think they've sent us equipment but he calls and says we're using our own - sometimes they send out a tech to fiddle with the ports of something so we can use our own and just return theirs. Someone will probably correct me on the specifics about the ports. This is not remotely in my home responsibilities. Lol