It turned out that the partial coverage of counts cube bins using the weighting array does not work. The problem is spill over of events from one RoI to another than can not be dealt with at the level of a stacked analysis. The old logic of using only fully contained pixel is put back into place. The weighting array is (for the moment) conserved as it could serve other purposes. However, excluding of pixels is already accomplished by setting a pixel value to -1, so it remains to be seen whether we would like to keep that logic or if we would like to use the weighting array (which is more universal).
