Ok - we've kinda talked about this before but now I really want to know what's involved...

We would like to connect more than one element to the end of a 1D element.  i.e we want a "branch" kind of structure.

The motivation is 1D structural dynamics (like truss and beam elements).

I know that find_neighbors() doesn't quite do the right thing right now - what other gotchas are involved with trying to do something like this?