> and one other device from a different manufacturer running different software but with the same information, for redundancy purposes This sounds like a great

> and one other device from a different manufacturer running different software but with the same information, for redundancy purposes This sounds like a great idea in theory, but as far as I know in practice isn't ideal. Problems include less familiarity with the second system/more training time required, issues with the second system may not be discovered since it's used less, and less incentive to get the first system right in the first place. What would perhaps be better is a backup running a previous software version, maybe.