Running two hosts on the beta in my lab and so far have had no issues at all (touch wood). Looking forward to this hitting production.
@badrAZ Yep.. that did the trick..
All working now.. nice.
OK, seems I wasn't trying hard enough.
I was trying to mount the tools under the iso list, but when I look further down the list to xc-ng Tools it turns out I can mount the tools from there as long as I do it manually (mount /dev/sr0 /media/blahblah).
Installed now, all good.
Groan... maybe testing with a machine what actually boots in kvm to start with would be a good idea... trust me to pick a broken machine to test with... now.. lets try that again shall we? Sorry for wasting your time all... will report back how I go with a working machine.