You'll have to repeat steps three and four several times to get it right. After putting a couple shims in, dial the grinder all the way down to the finest grind. If the burrs are not touching (that would definitely be a Bad Thing), depress the safety and let 'er rip.



The burrs should not grind against each other: a sign of poor alignment. If they do, but they didn't touch when the machine was off, you have some wrinkles or inconsistencies in your shims, making the stationary burr higher on one side than the other.



If they're not yet as close together as possible without touching, you can add another shim or two.



Once you've got the grinder shimmed to the point that the finest setting nearly touches the burrs together, you're done. Congratulations. You've just made a decent espresso grinder on the cheap! Of course, it's nowhere near Jolly or Rocky quality, but it'll put up a good front next to a Gaggia or Baratza.