[Latitude 28]

Thanks!  The stacking hole saw idea..... I've been trying to sort out the solution for this project for several months now.  Any idea I was coming up with was not going to be easy.  Until, I just recently saw someone on FB enlarging an existing hole using this method.....an eureka moment ensued.  So the stacking hole saws credit goes to someone on FB.....It certainly made this project work out!