[Montana Man]

My previous Montana had a small bit of what you are experiencing. I did make contact with the truck and the cracking eventually appeared. Contact can be made without you not even realizing it. It possibly could be from the transporter who moved it from the factory to your dealer. Or, if stored where others use whatever to move it from point A to B. From my experience it looks like an excessive force that fractured the fiberglass. If not an extended warranty issue, perhaps an insurance issue. Good luck and let us know how it goes.