I decided to go with the pop grains instead of the vellum grains, so that I might be able to fine-tune its behaviour a little bit better. But over here I stumbled over another issue I am sure there's an obvious solution, that my noobyness cannot seem to find.
I made a collider object outside of a pop network (grain) and want to reuse it in there. how do I approach that? And btw. what do I need to use, if the collider object isn't static but animated? (instead of the static solver?) D'you have any ideas?