I have 6" single wall 304L rigid pipe. I used steel pop rivots to put the sections together as all the stainless pop rivots that I got were complete crap. Will this work before I go dropping this pipe in the chimney? I have a top plate that should sit on top of the clay tile but what do I use to secure the pipe at the top of the chimney? Probably shoulda asked all this before doing things but I like going backwards. Thanks in advance