Hey guys, just an update ... I was able to borrow a projector and it does NOT display any of the artifacts. Given my time crunch I'm going to gamble that the projector I end up using for the presentation will behave the same. With the differences between a projector lens and an LED monitor, I think I will be ok. So, for now, I'm going to table this issue as an interesting discussion worthy of more attention at some future date.
Thanks for all the great feedback, was really appreciated.
Darrin