Please check the package (unity5) to see the problem, it's better than my explanation.
*includes a new Playmaker action mathf.smoothdamp
explanation: I have a cannon that is rotating to the mouse using get screen point and mathf rad2deg on the X and Y of those two points. That part works. What doesn't work is trying to smooth that rotation using the mathf.smoothdamp with the current rotation. I have the whole thing in script form and in actions to try and solve it but I keep hitting walls. Any help with this would be really appreciated!
*Anyone else can use the 2D rotation if they want as well, just change the set vector 3.z from lerp _fl to rotationZ _fl.