How much of the "spatula effect" is caused by the bag itself?
Would it work much better if you had a bag with the first 1 or 2 feet from the snuffer made fron an open mesh or net?
I know the Tiger people had many problems with the standard tapered Hobie bag.
Many of them have since bought Elliot/Pattison non-tapered bags.
Apparently the spi jams into the tapered bag so tight that the water drains very slowly.
What about a completely net bag? Maybe long enough to store the spi or most of it, under the tramp?

Just guessing here.