Well,  the math is beyond me.

However,  I may have spoken too soon.  After doing some more tests, I'm finding it difficult to recreate some of the errors I was getting just a few months ago, so I'm gonna make a wild guess and assume that SR 3 might have solved some rendering issues.  Hmmmm, the things that go on  when you look away for a short time.  :)

oh well,  take care
jdc