I have gotten quotes on replacing the shutter on my 645AF. So far, they are way out of my price range. I am in a catch 22 here because I have had to cancel a few paying jobs since my return from NM for lack of a functional and reliable camera. So, here is my question. If I could get ahold of the parts, is this something I might could do myself? Or, is it better to try and scrape up the money and pay someone else.