I want to so badly say yeah its the only variable so it has to be the culprit. But I haven't brewed with mig and can't say beyond the reason of a doubt there wasn't something more in the the limited oils I used of verified mig840.So are you thinking that the propylene glycol might have been causing problems? I'm curious what you were experiencing.
If I can find a minimal amount. I will try mig840 alone and see how I react. So I can settle this looming question in my mind.
