Now that you have spit and shined V3, a wish for the Explode IPAS:
animated blast radius so a big object does not all explode at once,
but over N frames starting from the center of the bounding box out.
I'm simulating this via breaking the object into pieces and exploding
each separately at different frames, but it's the long way around.
FWIW: have you considered selling off upgrade rights for your IPAS
routines to someone like Pyros Partnership? Or do you have to much
fun playing with them <g>?