I have used T-max film and T-max developer since its inception. I use same dilution as suggested 1/4. I develop at 75F, and agitate,every 30 seconds, vigorously for 5 seconds, the key word vigorous. I process for 6.5 minutes. I do not use the "soup" again. I start from scratch. My neg's are consistent in that I rarely have to print on other than #2 or #2.5 filters. I believe your problem is in the agitation. Maybe not. best of luck. cliff watkins(posted 9155 days ago)