I have had some good reports on the detector cable guards (fits under the handle). They seem to be a worthwhile piece of kit to keep down cable noise (from knocking) and take the strain off the joiner. Any users who can provide feedback? They are inexpensive so I may give them a go. The 4500 doesn't seem to be too much of an issue at the moment, but my old 2200D gets a bit wobbly if the cable gets knocked. About $20.