Coffin Corner and megapixel32,
I don't believe the information regarding JAA to OZ is correct - might only require an Air Leg exam. I would check it out with CASA, not sure but I think it's a lot easier than going the other way.
However the rest of the info is 100% spot on. If you were to go to the trouble of converting, I think there would be a lot better job options than QL!