QUOTE (sgarnett @ May 5 2004, 12:49 PM)
Ignoring the issue of keeping you in your seat, it's the relative angle of the belt compared to the spine that matters for protecting your spine.
that is the way I had always understood it should be at a 90* angle compared to the spine, but being that most of us do not sit with our spines vertical, the mounting does end up being below shoulder level.