Hi Niel,
i hope you're still reading this thread.
Just one more advice please : about UPS, somebody else gave me the same advice but told me to put it on the controler. Then when we loose power, controller will see that there is no network, no shelf and will initiate a switchover.
The advantage given there, compared to the solution where the ups is on shelf, is that we need only a little ups. Shelf is more power demanding.
Do you agree with that ?
thanks