Photo life is much better for me when I can shoot at 640 than when I must shoot at 320. All my black and white shooting, for the time, being is on Tri-X. Now, Kodak says on their website that a one stop increase in Tri-X's speed is best accomplished by processing normally, and falling back on the emulsion's exposure latitude. Other sources, however, insist on pushing, or substituting microphen or accufine for one's normal developer. What's a poor novice to do?(posted 9130 days ago)FWIW, I have been following the oft-given advice to stick with one developer (FG7, no sulfite) until one has a feel for its potential. I've gotten my time/agitation down to a point where I like the negatives I get from Tri-X at 320 and FG7. So, what's the best way to get negs processed at 640 that (as closely as possible) resemble the negs shot at 320?