Has anyone had to have their inlet and exhaust valve clearances adjusted?

What is your question?

The service manual recommends having these inspected and adjusted 30,000 miles. I had mine checked at the mitsubishi dealer for the first time at 69,000 miles. They found them to be within spec at .008" intake and .012" exhaust clearances. No adjustments needed, but the bill was $348 to find this out. Is this being too precausious by mitusibishi or do they really need an adjustment at some period well the 30,000 miles?