In terms of measuring the roller spacing, if you don't have a metric ruler with that resolution, look up "pupillary distance ruler" online. This is used to measure the spacing between your pupils for eyeglasses, but it's also a handy way to measure roller spacing! Just make sure your printer is set up to print at 100% without resizing or fitting the document to the page. It can often be easier to measure between the centers of the two outer rollers vs. two adjacent rollers (really, you're measuring between the centers of the screws holding the roller gears in place). If you get 70mm, then you have standard 35mm spacing. 72mm = 36mm roller spacing, and 78mm = 39mm spacing.
Remember Anthony Weller, please help. Contact myself or Aaron Green for details.