I have noticed that I have come across several McLAUGHLIN CD 162 and 164's That have a continuous Drip, but yet there is no reference to them in the guide. The example here has clearly got a flat area either side of the ring base and well defined and centered. This is not just limited to the one in the picture as I have several others and in different colors. I don't see these guys very often, but all I see in the guide is for a reference to the smooth base. Just curious for info on these and any other sightings of this would be mos useful. Thanks and Happy Hunting.