I'm sorry to tell you that you.......as the thread starter........have the onerous of providing the hard evidence. You've provided anecdotal stories without a shred of hard evidence concerning a back to back test on a M/B diesel.


And, you've clearly ignored the very good analogy of an architect who would laugh in the face of someone who demanded hard evidence of the fact that a 2" x 4" won't work as a proper header above an 8' garage door.

You do know that this header would be inappropriate.......don't you?? Maybe I'm making some cavalier assumptions regarding your knowledge of building construction??