The model is watertight, checked by different methods. There's no topological issues, flipped normals, etc.
I am ready to answer any questions you might have about the model. Check out my profile to see the other stuff!
PLEASE NOTE You cannot sell, rent or lease this model to a third party in a digital form. You cannot include model in another design or in any format, or give them away for free. You can arbitrarily dispose of material products manufactured using this model.