Ok, so I was very late to the dog earing party, but I'm a quick learner and I noticed something early on about the importance of rubber width. I used to think that all rubber was the exact same width, but there are small but game breaking differences. I doubt it would make much difference in a normal non-dog eared channel, but with a dog eared channel, it can be the difference between it simply working or not. From my findings, the unger rubber has the smallest width, the moerman, pulex and razrblade rubber is about the same (there are small differences). The unger rubber may only be like 1mm shorter, but it's the only rubber that will effectively work right with my custom dog eared contico/pulex channels. I'm sure some of you will know this, but for the dog ear newbies, look at this diagram. I'm specifically taking about the distance highlighted by the green arrows: http://i.imgur.com/b0cFZsA.jpg There are several notes to make: 1, The razrblade rubber is about perfect for the liquidator channel. 2. The unger rubber is too short for the liquidator 3. The razrblade rubber is way too long for the pulex channel 4. The unger rubber is ok for the pulex channel. The reasons are thus; if the rubber is too long, then the dog ear is not effectively pressing onto the rubber which is making contact with the window. If the rubber is too short, that can mean that the rubber in the middle of the channel is not sticking out enough to make proper contact with the window, even if the rubber under the dog ear is. Also, if the rubber is too short, the rubber can get pulled under the dog ear.