I tried some 120 format Tri-X in Diafine in a search for a low-light film/developer combination. Pretty much "by the book" as a starting point. Agitation is supposed to be "gentle" so's I did one easy inversion every minute. I ended up with some streaks. I have not printed any of the negs larger than 8x10, but things look pretty reasonable. Good tonal range and densities. I was wondering if diluting the two solutions and developing longer would help prevent streaks? Maybe someone has a different solution. I am open to suggestions.