Thats not cheating! It fine for you to add your own tracking markers, in fact, it makes the job so much easier!! You may have to composite them out though in post, if you place tracking markers in visible positions where you won't have objects covering them. I say good thinking! Blu-tack - I would never have thought of that! I just wish they'd done that in some of the shots I've worked on, it would have saved a lot of grief, lol!