Shaunj: great info. Thanks for that. I havn't done anything nearly as extensive as your workflow but looking at your negatives, they are far better than anything I'm getting. Even my 645 scans, although detailed look a little soft at times.
I just got rid of my 35mm camera cos I wasn't satisfied with the scans I was getting from it. Maybe there's still life in 35mm and I'm just not getting the best out of it.