The barrel and the forearm don't have a seam, as one piece was big enough to cover each of them. When I did the seam on the stock and receiver, just overlapped the pieces, and heated the top piece with the heat gun. This makes it soft and stretchy. I then just stretched the material a little, and pressed it down. When I stretched it, I stretched it more in some places than others, so the seam didn't have a strait edge. They blended in really well.