Quote Originally Posted by Michael R 1974 View Post
Agitation should NOT be vigourous.
Yes, it should (though not unnecessary violent, off course).
I will just give some hint of evidence:
1) My own experience with many years problem with uneven development and a lot of experimentation,
2) Scientific evidens about what happens at the film surface when the film is moving around in the developer, nicely explained by Gordon Hutchings in his "The Book of Pyro" (p. 20) where he explains the "laminar flow" which is part of the scientific explanation of why many "soft" agitain methods are inadequate,
3) "Use vigorious agitation at 30 seconds interval" is Kodak's recommended agitation method on the filmpack for T-max 400.

But as long as you get the negatives you want your method is the best!
/Bertil