At the rear of the ship is the main ‘rat-tail’. This area went through many changes before I was happy, using the car mud guards looks good for the cylindrical part. But the 2x1 flat areas took a bit of integrating. Then there’s the tail itself which has Lego parts arranged in 4 different ways to get the right feel. It’s still not perfect (as if it ever will be!), but it’s the best I can come up with.