I don't understand why a 5mm threaded hole in the side of the stem is such a bad idea. How does it comprise the stem, does the hole, or edges of the hole, create stress risers or ...? By the time the torque loads created by pulling on the bars travel to that portion of the stem it seems like they would be dissipated a lot(excuse my ignorance of mechanical engineering). Looking forward to enlightenment.

thanks, Brian