As a quick aside Wayne.
I reccomend that you read the SFI article located at:
http://www.sfifoundation.com/seatbelt.html
You might notice that the included angles are a bit different that what you have said.
I quote directly from the SFI page.
"The end attachments of the shoulder harness must also be installed at appropriate angles. The ideal position is anywhere between 5° below and 30° above the driver's shoulder, as seen in part C of the Figure.
If the upper attachment point falls significantly below the driver's shoulder, then a spinal compression injury is likely to occur. In an accident situation, the shoulder belts pull down and back on the torso as they resist the forward motion of the driver. The resultant restraint force compresses the spinal column and will add to the stresses in the spine already caused by the force of the crash impact."
It seems to me that your statements need a bit of looking at and you need to apologize to Bob P. at the very least
(You were the one to bring in SFI after all to support your position.)
Regards,
Richard Hudgins
http;//www.jblmotor.com