I found it, thank you for the information. You're quite right, it is not too helpful here. Also found the service manual for the WM3470, but I fear these service manuals we've been looking at are for the simple repairman, and it's nothing like a technical manual w/ highly detailed specifications.
There might be info in there that is pertinent to the rinsing situation, I'm not sure I understand it, but in any case my experience is that the rinse cycle only makes one single request for fresh water in the default cottons/normal cycle.