I took the original apart and made an extra layer so there are four all up with ruffles on each. Put face to face so that all the ruffles are inside rather than directly under the taffeta skirt or against my legs.
And it stands up by itself..
The third layer is the most supportive:
The ruffles are super dense at the top to create a bit of a bustle.
Outermost ruffles are soft and long (three rows). So the following photos are from outside in: