Hi Daniel, 

I have been playing around with the new kangaroo solver quite a bit now and it is great, it does however have a slight disadvantage over the old solver - The collapsing of short springs. 

I am working on a project where we have trimmed a mesh based on a boundary which at times leaves short lines/springs along the edge. With the old kangaroo you could run it with these and it wouldn't care(will give a weird edge), or you can(what we did) alternatively make find these short segments on the edge and make the start/end points fixed points, we are however still inputting the short segment as a spring(which doesn't move because of the before mentioned fix points), and the old solver wouldn't care. 

The new solver however collapses the short segments, which then makes the entire structure i am working on disappear(see attached images). I have however found a way to fix this, which is to remove the short segments from the spring list, and still use them as fixed points. And then put the full geometry through as a "show" object.

My question is, would it be possible for the future to potentially alter the tolerance? you know with a settings component similar to that in the former kangaroo options.

Keep up the excellent work!

- Jens