was Ra talking to Ra through Carla?

[Questioner]

Ra's extreme precision and cautious, deliberate striving for clarity really stand out to me too. When I remarked on this a while back, a few people agreed, but some who have heard the original audio recordings said that there is actually a fair degree of emotional intensity in Ra's speaking.

A good case could be made for any of the three being a 6D Wanderer.
If it was Don, that might explain his perspicacious questioning. (I don't think I've ever had occasion to use that word before.)
If it was Carla, that might explain her ability to be the instrument, having an energetic match with Ra's transmission, once her own 3D thought process was set aside.
If it was Jim, that might explain his presence uplifting the contact so that Don and Ra were able to synchronize their conversation.

I think Ra's quote does not say whether the group had a pair of 5D and one 6D, or the other way around.

My guess is that if anyone asked Q'uo, the response would probably be something like "That's irrelevant and doesn't help you with your own spiritual growth. Next!"