I am having a really hard time joining these two surfaces! This model has proven to be very difficult becuase not only have I joined the surfaces using nonmanifold merge, then I offset the surface to create a solid, it says it fails at creating a solid which I can only suspect is becuase the “merging” isnt full succesful or well done. My other reason for suspecting this is because when I export it as an stl and open it with Meshlab it tells me there are 2 meshes not one. I am very confused! Anyone know I good way to join and make it a watertight object? I am really struggling and trying to meet a deadline!! Thank you!!