I created a model of the Hindenburg a while ago in Carrara 4. I'd like to use it in Carrara 7 but have encountered conversion problems. Some of the geometry shows up other parts do not. I'd like to work with the model because I spent a lot of time on it. Is there a way to make this conversion so that the model comes in cleanly. I still have Carrara 4 on my machine. Thanks!