Now I've read absolutely nothing but fantastic reviews and feedback regarding satinsnows gg. Now as a recent father to a 4x5, when does one need a new gg? (with the exception of a broken one) What are the characteristics of poor gg? I seem to be at a loss. The one I have in my crown graphic i just cleaned, and when under a darkcloth(homemade) its bright, except when i stop way done, then its hard to see.