We are running Power-1 5077 pair (active/standby) on R71.30. We would like to upgrade our gatekeepers and smartcenter boxes to the latest code. I ran the upgrade wizard and it seems like we will have to upgrade to 75.20 --> 77 --> 77.20. I just wanted to check with you all have seen any issues with these releases and if you can share any documentation on upgrading the firewall cluster. Your help will be very much appreciated.