Thanks Grant. I wasn't aware that the 80s models were produced in B riser lengths only. That explains why I've never seen one of those in an A riser (my favorite length) come up for sale. Also wasn't aware of the cast vs stamped hardware.
I have a newer model A riser. I haven't been able to come up with the price of a 69-71, and they're pretty rare to begin with. Anyway, the laminated birch or maple on the newer models shouldn't have any strength problems, but there are two areas in which they might have improved it. There is some sort of hard, flocked coating on the hinges. Doesn't look that hot, and it flakes/chips off rather easily. On my bow, one piece flaked off from what appears to be no more than just shooting the bow.
I also find it interesting that Bear put a substantial radius on the arrow plate forward of the arrow rest, but almost none rear of the arrow rest, where it is most needed, IMO. At least that's the way it is on the three newer risers that I've seen. This is side-plate radius, not shelf radius. Doesn't appear to be any shelf radius, but that's easily remedied with a little wedge under the shelf material.