I've been using T-max developer for 2 years. I wanted to save shipping, so I got some D76 in pouches. Mixed per the instructions, and developed my first roll in stock D76. Ouch! A very noticeable grain that was never an issue on the T-max. Film is 120 Arista 400ASA. I followed Arista directions for D76. I may have over agitated. I used about 15 seconds of end over end at the pour, and then 5 turnovers every minute. Temp was 68F. Comments?