Thanks for all of your answers. A few more questions.
As I mentioned in my last post. I sent out my test Gerber file to my vendor and I have the film back and I checked a few dimensions. The measurements seem to be slightly on the minus side. I had a Ø.152 and it measured Ø.1517, a line width of .006 measured .0059. Does ACE have an accuracy set up?
When you export gerber files that require fine resolution (better than 0.001"), make sure to use a "Decimal Accuracy" of 5 places or higher (6 decimal places is the highest accuracy). Please see the link from the ACE forum:
Here's a screen capture where you can assign the Decimal accuracy for exported Gerber files: