[Adger Smith]

I think the problem that Tech & SFI has had with the Jaz poly seats is the Hot Knife used to cut the openings for the belts would leave a sharp edge and chafe the belt and weaken them. I was told by a very creditable source that is what happened and added to the results of Lee Shepherd's crash, hence the inspections for seat belts. In recent years they have gone to milling the openings out with a mill instead of the hot knife. You still need to be careful with those seat openings and belt chafing. The thread inserts are another problem that should be addressed. Those seats are almost as comfortable as a form fitting foam fill.