Hi Mike, make sure you have units set in MoI to inches, cm, or mm before either opening or importing the AI file and that will likely help.

AI files natively contain their coordinates in "points" units, with 1 pt = 1/72 of an inch (it's a unit from typography), if you have units set in MoI to any of inches, cm, or mm it will scale from points into those units but if you don't MoI will instead just scale by 1/20 in size to get a fairly reasonable numeric range rather than having numeric values in the thousands as points units on a printed page usually have.

So anyway if you set your units in MoI to inches before doing any transfer (either writing out or importing in too) that should help you.

- Michael