Replacing LTMs in GTM Server List

Thank you for the granular back up suggestion.  I've put that to use extensively while migrating the LTMs to their new platform.  I was planning on keeping mulitple backups within reach during this reconfiguration.

I do not intend to delete the servers -- ServerDC1, ServerDC2 -- however.  I intend to delete the devices under the Servers.  Here's what the config looks like from 'tmsh list gtm server ServerDC1`

gtm server ServerDC1 {
    addresses {
        10.10.10.1 {
            device-name LTMDC1-1
        }   
        10.10.10.2 {
            device-name "LTMDC1-1 Peer"
        }
    }
    datacenter DC1
    devices {
        LTMDC1-1 {
            addresses {
                10.10.10.1 { }
            }
        }
        "LTMDC1-1 Peer" {
             addresses {
                 10.10.10.2 { }
             }
         }
    }
    monitor bigip
    product bigip
    virtual-servers {
    /Common/virtual1 {
        destination 1.1.1.1:https
        }
    /Common/virtual2 {
        destination 1.1.1.2:https
        }
    /Common/virtual3 {
        destination 1.1.1.3:https
        }
and so on....  

This suggests to me that I can delete one device, and the other device will continue to feed the same VSs to GTM.  Afterall, if the active member of a LTM HA pair crashes and burns, and the standby takes over, the standby will feed the same VS status data to GTM, continuing to populate the Server's virtual-servers configuration.   Yes?  The thought that triggered posting this note was: Will GTM act differently between two different scenarios, 1) iquery comms are down from one of a pair of HA devices, and 2) a device, one of two in an HA pair, has been administratively deleted?   I suppose should the latter scenario cause the virtuals under ServerDC1 to be deleted, I will restore them from backup.