I was contemplating having a go at U-Don's Los Angeles-class submarine and printed out a page just to see if the scale calibration thing was right, and I've got a problem. Or maybe I don't. Every time I print it out -- no matter what settings I use -- the 1 cm calibration mark measures out to about .95 cm, while the 1 inch calibration mark measures out to 31/32nd of an inch. Is this normal? Is this considered close enough to start printing stuff out, or are they supposed to match perfectly? It looks like a nice model. I just don't want to print it out just to wind up having all the dimensions out of whack.