Strangely, they used NSSMU to remove and recreate the volume. I'm not sure why it worked for them and not for me, but they did update the pool object a second time and somehow the volume object updated after that. Kind of irritating when it's that easy - makes me feel like a wasted a service request....

I'll have to re-import the home directories from my backup, but that's ok. The drive mappings are working now, using the CN so all is well.

Thanks for the assistance, it is much appreciated.