I just bought 10sh 5x4 Kodak Ektachrome E100S and 10sh E100SW dated '98 for £1, any idea if it'll be any good for xpro? I've never done it before and have found little advice on the net, especially for old film. Will I need to overexpose? Just try a sheet and see what happens before I do any more? I'm looking forward to trying it but don't want to waste more film than I have to in case I like what I get! Thanks, Jonathan.