Thanks for the clarification -- that's what I suspected, but thought I must be misreading or misunderstanding, but I also don't know your situation and trust you're making the right set of trade-offs here. If your system is today a cuttlefish, yesterday a cow, and tomorrow a crab, cow tests don't do you much good. That sounds like a crazy environment, and I'd maybe have a care that those hapless idiots are sane people in an insane place.