I might have come across some sort of bug in the attached file.
I have an object I split/clip in half, animated each part individually and merged back together. If I fuse the points back together before the Spring Modifier, half of the object explodes. Of course, I can fuse it back together after the Spring Modifier, but figured I'd report it just in case.
I deleted all attributes, and I've been trying to figure out why this is happening, but diving into the Spring Modifier I can only make a guess that perhaps there's some magic intrinsics values that comes into play

Otherwise, thanks for a great collection of tools you're making!