You're not wrong, there are so many sins in the creation of this beast. A test would at least give me some purchase to grip the logic from. But we own lots of

You're not wrong, there are so many sins in the creation of this beast. A test would at least give me some purchase to grip the logic from. But we own lots of legacy stuff. It's only this one that gives me a headache. Honestly, I wish it had bugs or failed occasionally so I could justify replacing it!