Currently, the charting only allows for one scale per axis. Has anyone extended Ext to allow for multiple scales per axis? I need to relay related but different information by using two scales on the same axis.

I was going to try to use the GVisualizationPanel plugin, since Google Visualization will do what I need, but it's outdated and doesn't even begin to work with Ext JS 4. If someone has fixed it to work with 4 I would greatly appreciate the help with it.