After the first 30 seconds continuous agitation I give two inversion every 30 seconds, but they're _complete_ inversions as the film is completely lifted out of the developer and plunged back in. At any rate, it shouldn't make any difference how agitation is done as long as it's sufficient for the specified time. Or iow, it's easy to underagitate but impossible to overagitate. Not that that has anything to do with your grain question. It doesn't. A more-dilute developer usually gives higher acutance at the expense of more apparent grain.(posted 9248 days ago)