I have a batch of bullet-proof negs - I think I mistakenly over-developed them. Am having a tough time even making contact sheets w/ no. 0 filter. I know there is a way to chemically try to remedy this on the negatives. How do I do it? And how much better will they look - in other words, is it worth it? Will I be able to get decent prints? I sure would appreciate any help/anecdotes anyone can provide.