SRM 6.1 with VR replication only?

Hello,

I haven't worked with SRM for a little while and thought I would throw it together in my lab in order to see the changes.  I had done this previously using VR replication, but from what I see it appears that SRM 6.1 requires SRA's.  Is that the case?

Sorry I have to ask this here, I've searched the release notes and the answer is not clear.

Thanks.