Well, Robert, it looks like you're ready to go down the tray development path. I suggest that you read the description of the entire process in Anchell's book "The Film Development Cookbook". A good addition to anyone's photo library. As far as timing, I use a Gralab 300 timer. It glows in the dark. It sits across the room and does not fog fast film at that distance. I don't recommend LED readout timers for film, although they work fine for paper. Tray development takes practice. Don't become discouraged if you get a few scratches at the beginning. Oh yes, cut your fingernails very short.