thanks - this helps me move forward!

Hmmm... the documentation seems to say you can stitch on only 1 field per virtual report suite (i.e., cannot mix data from 2 different fields, which makes sense for efficiency).  We have 1 type of customer ID in evarX, and 2nd type of customer ID in evarY, and probably another in evarZ that I don't ...

If you're still fielding follow-up questions on these: Do you know if the Cross-Device virtual-report-suite method is limited to 1 data field per virtual report suite, or 1 per original report suite, or 1 per account ? Or is this an "ask your account manager" item?  Happily, I think we are an Ultima...

Thank you - very helpful!about the Audience Manager method - I'm not sure exactly how that proposal would work. I suspect (hope) we do have Ultimate, but will need to find out. Taking your suggestion, I'm reading up on Cross-Device - https://experienceleague.adobe.com/docs/analytics/components/cda/o...

My organization currently saves unique customer IDs as a hit-based evar. I would love to count Unique Visitors in Analytics Workspace based on those IDs instead of the Adobe ID. I believe that CJA would be a perfect solution for this, but widespread implementation of CJA at this org might be a year...