My K-x' Time Longevity on AF Accuracy

Almost one year ago, I bought my K-x. The first unit of mine was replaced owing to some problems, one of which was the obvious back focusing with the fast Pentax primes, including both the FA 43 and FA 31. Eventually, I got my another K-x unit only in another month, as the Blue Navy K-x was out of stock shortly (and so quickly) within the first week after the goods had arrived in Hong Kong.Now,