I was reviewing the manufacturer's recommendations the other night (first roll of Delta 3200 in 120), and was idly curious about their recommended agitation schedule (5sec every 30 sec), wherease I had picked up 10 sec every minute from somewhere. I presume that this was because I was using DK-50 + HP5, and wanted better edge effects, but the younger me isn't answering today.

What do the other roll-film types here do, and any rationale?