I thought I would start a new thread rather than trash the one that I made this post from.Bev, I can't see anything either so I just split by the box. Find the nest in a stack of mediums where the bees are going gang busters and split. Put another empty box on top with drawn comb. Just about every week you can split again during a good flow. You can even throw that box of pollen on top so you have 3 mediums. When you see the brown dust in the bottom of the tray you know the bees went into that box. Another great advantage of the SBB.
All I have ever done is split by the box and had very good luck doing it. I think it makes a difference when your boxes are all mediums rather than deeps because there is more of a chance that the nest is in multiple boxes. I made the comment that you could split every week but maybe it should be every other week.
And Kevin, never have I feed a split. In a flow (my area anyway) you don't need to. The split that doesn't have the queen doesn't have any brood to take care of so it collects honey like crazy. The half that has the queen usually gets all the foragers and keeps on trucking. The only issue about splitting every other week is you have to keep splitting the one that has the queen, which would be the one with brood and no queen cells. This is also the one with lots of bees.