We are evaluating Nevron.
Our plan would be to use a Grid Surface Chart with the NTrackballTool so that the user can rotate it.  In our test implementation the behavior is that the chart zooms in and out when rotated (only slightly).  It is zoomed in when looking straight on and zoomed out when looking diagonal.  The behavior seem to be set to allow the chart to consume the available space.

This behavior can be annoying.  How can I allow rotation without the auto zooming?