I order gear from sources verified by this site, the stuff I used was something I came up on as it was given to me. I agree with what you said about everyone is different in how they respond to different compounds. Just sharing my experience with that particular carrier oil
Oh I'm not hating, and if enough people come out and say they have a problem with that oil... maybe labs will stop using it.
But again it falls under the whole "you can't fix what you don't know is wrong"
If you yourself looked to brew your own at home, looked up a list of what to buy bought this oil and everything worked great. Got good results, little pip, no test flu... everything was fine. Would you think "man I really need to change this oil?"
Of course you wouldn't.
But if you gave a vial to your buddy and he had unbearable pip, and test flu... you'd probably think it was just him. Only if you gave it to several more people who had similar issues would you think... ok something is wrong.
That's why these forums are so important. Customers feedback is vital