The capacity of the vers 2 cushies / sdk is wonderful. Over twice the capacity of the originals. The high capacity and the single tapes make it challenging to use to anywhere near capacity though without leaking. I'd estimate I start getting into the danger zone at about the same capacity as a completely soaked abena L4. That's with the L4 wet all the way to the back top, compared to the SDK wet to within maybe 4" of the back top. That last 4" or so is difficult to touch, but can be done if you limit yourself to more frequent, smaller volume wettings as the SDK gets filled, and don't move around immediatley after wetting.
I'd also like to say that the SDK tapes are very strong, stick very well, and can be moved at least once without risking a tape pop. On the second move, it starts getting more iffy.