I never agitate vigorously in the sense of shaking the tank. I tap the bottom of it at the start of the cycle to clear any airbells, then reverse tip it upside-down twice every 30 secs, rather gently, like
the old Kodak manuals depicted.
I got so carried away with my response that I forgot about the very basics of answering the OP's question. Yes, I too never agitate in crazy manners, gentle full tank inversion does it. I use a 10s every minute as standard, and manage three full inversions in that time, plus giving the tank a couple of taps against the counter top (to get rid of air bubbles), before I set the tank to rest again.
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