David, hi ,many thanks for your response.
We are unable to change the mastership , as this would require a change request , and other paper work, and the issue is not that much a a problem currently.
The G1 x 2 are an original horizontal stack between two data centers.
We added two new G2 to the stack , again 1 in each data center.
The original stack only had two members ( one in each data center ) and we saw the appropriate alarms when either a stacking port went down or when a switch was rebooted.
We are configured for v160
In the end the plan is to remove the G1's and return to a 2 unit horizontal stack of G2's
We have reset teh various SNMP protocols .. hence my question about the X670-g2 units being supported in Netsight.