Hi Micah0,
I am glad you have enjoyed using APS, and thanks for bringing it back to my attention. Whilst jogging my memory with regards to your questions I came across the following:
and realized this should be possible with APS. A gui setting for global repulsive force and a global force cutoff combined with APS's other features would open up a whole new level of emergent behavior. Thanks also for pointing out the deletion issue.
I think a new update is due.