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How much more are your holes coming out undersized? Have you tried using the same file on both machines and see what the difference is? Currently my .25 hole comes out as 0.196, which is way off for having millions of polygons defining the circumference. The stratsys always prints perfect holes ...

I am using millions of polygons for the .25 hole. I use a stratasys fortus 400 everyday at work and don't have the same issue.

I have spent hours upon hours fine tuning my V1 printer. I have finally achieved good prints with ABS, but I have a problem. I am printing a 1 inch thin square with a .25 inch hole in the center in order to calibrate the scale of my prints. The outside comes out perfect. 1.000 in. The hole is 0.196 ...