Thanks for the responses guys, I will try that this weekend.
I have what is now probably a couple of academic questions:
I have a spare ESXi server (free version) that I could take out to the site where this install is. I wondered about moving the vCenter appliance to the third ESXi server and using it to manage the cluster. Would that work?
Can I add a second, redundant, vCenter server to the network to manage the environment. Maybe on a domain controller that will remain physical. If so how do the two vCenter servers share data?
Thanks,
Jeff