I've had the Brotherhood message. Days and days and days have passed but I've not yet had the Followers message, which is the one I want.
I've looked on the Vault and gone and had most of the conversations suggested there - no joy

Could it be because I "parked" ED-E for a while to do the Rex quests?
Is there a 100% guaranteed way to trigger this message?

I'd really like to have the Followers rather than Brotherhood do her (ED-E) but am starting to think I've somehow missed the boat.

Have you gone to Hidden Valley yet? That's what does it for me.

Thanks - I'll try that now

YEY!! It worked - thanks
I'd not gone there cos I didn't want to take ED-E to Lorenzo, but I didn't even have to go into the bunker - soon as I got to Hidden Valley it triggered.
Really grateful, thanks again :):)

I had the same problem one time but when I was about to enter the BoS base it triggered the Follower's message.

Edit: Ok ok, so it worked for you too. Didnt see that.