So why is the cow protein different then?
This is the problem with ID as science. It's all over both sides of the evidence. If it works, it's re-used. If it's different, it's because the designer knows something we don't know.
What's ironic is that as more and more of these irreducibly complex features are explained, ID is starting to sound more and more like evolutionary theory.
Well, I hardly think evolutionary theory is the model of consistency we should all aspire to.
In the engineering side of my company, we can re-use design components where appropriate and that is certainly most efficient where it is applicable. There are other situations where we have to start nearly from scratch, because the solution demands a different design from the ones that we already have stored in our AutoCAD templates file.
It's design to fit the specified operating parameters. We do it all the time.