That is great, thanks. The Unity work chain orbits around Mechanim. Everything is much easier to do in Unity if the rig is mechanim.
All good I totally understand, should have the update out by tomorrow. The awkward thing is that the rig is unity native, you will see that when you bring it in via the rigging menu. But for some reason Mechanim animations don't work with my rig, my assumption is it something to do with the way I've structured my IK Targets. It's something I will have to research and test more in the future.