Anyone have a suggestion on putting this thing together? I think I am going to take it all apart and work backwards, from Muffler to primary cats. This thing just shouldn't be that diffcult, should it? I am no expert mechanic but I'm also no newb with turning a wrench, so I am getting a little perplexed on what in the H E double hockey sticks is going on. I am open to suggestions, PLEASE!