Phil, Reducing agitation does several beneficial things. One, it improves resolution of fine detail, it improves sharpness by enhancing adjacency effects, it lessens grain clumping and it significantly smooths tonal gradation. I would suggest agitating constantly for one minute, then 10 sec./min. thereafter. You will need to increase your development time by about 30%.(posted 8391 days ago)If you want to experiment further with this concept, try diluting your developer to 1:100, and double the adjusted time, which in your case would be 26 min. Use the same agitation method. You probably could get by with agitating 10sec/3min after the midway point with little difference. This, admittedly, is tedious, but the results will amaze you.