I have checked the samples that comes with Unity 3D (especially the starter kit) and you have right, seems like the plane model were taken from this . Dev has asked to someone else to do it?l I haven't played with Unity since the 3.5.2 version, really long time ago, thank you for reminding me
After all those days shit, now I'm just curious to see that dbic-ex to see if it comes to life for real