FWB It's a magic material that just doesn't seam to wear. If the mix of the material is to hard the gear breaks, same for too soft. 2 yearson the shaft on my distributor and no wear. I had a steel gear on for 9 years and also no wear. I have
oil leaking on the location between the to gears where they meet. I also have only .003" of end play for the cam shaft. This also stop alot of wearing on the gears both camshaft and distributor.
Oil to this location and the timing chain extend the life of both 50% longer and cool the parts too. Rick L.