Surely the dirtier the dibber, the greater the coudos? To be worn as a badge of honour? A mark of experience in the world of hole making? In a similar way, in my days in archaeology, experience was shown through the size of one's trowel. My 4 incher was hardly blunted, compared to the size of the one owned by the hardened archaeologist, with his stumpy little tool barely an inch long. Respect!