Okay, I'm about to do this again. I did it once about 500 miles after the Dealer did my "warranty" adjustment, and again just a couple hundred miles ago. I used Clymer's instructions both times. The first time was slow because it was my first time, but everything went the way the book said it would. The second time, I couldn't get a gap on any of the valves, so I put the two I had loosened as close as I could get them to match the other two. It runs and sounds good, but I'm really afraid of burning my valves. I have everything open, including a cold beer. I'm going in!