I understand the sync id thing.. it was not a viable solution to have multiples.. this a master/backup situation where everything needed to be online and primary/backup sets had to have matching programming. Different switches still doesnt fix without using managed switches and adds more cable and connections to be made every day. The new options in 364 may fix this for this arrangement but if I understand correctly there are only enough choices to run a few different subnets of sync as you cannot manually input the subnet. I havent had a chance to try migrating to 364 yet