thanks you ! you 2 staunch allies
the clip can be placed in the middle to take away the dog earing effect.... and you could possible get away with the clip being very short in length even a quarter the original size

maybe --
the point is the dog earing can be created in another way with out cutting a channel wether that be a clip or adding extra thickness to the channel or blade to force the blade to be dog eared and help with leaving as little water on the window as possible..
in effect there is a patent there or design... because when a squeegee is dog eared so being that it does not alter performance .. this can only make the window cleaners day easier because there is little or no detailing.. this will save 50 % time on detailing. so which serious window cleaner does not want that ?