We have done it here (and will soon be doing it again, I regret to
say) by putting the ashes in a small brown Iunch bag), which in turn
has another small brown bag (same size) inverted over it. Strings to
bottoms of both bags, out the small window with a slight slip to the
right side, jerk the strings until the two bags separate and empty
their ashes, at which point you have a string with two brown bags
hanging from their bottoms. Neat and quick. Don't fly without the
canopy -- you'll have a cockpit full of ashes. And don't try to push
the ashes out the small vent window by the scoop full -- more inside
than out. Fred