In the second link if you look closely, look at how he has cut out the filter element from the endcaps for all the filters, but, for the ecore designed STP filter, the felt endcaps have been just peeled off. However, the cardboard caps of the Fram have to be cut off, because there is enough bond there because of the glue that they will not just peel off like the ecore design. Very intresting. Same is evident in the other ecore disgned filters, this will make me stay away from ecore designed filters. At least Fram with their cheap cardboard endcaps has them properly secured to the filter element.