Thanks all... nurse bees are the area of awareness that needs attending to then. There will be a balance between those attending to the now heavy capped and emerging population above and those dealing with pre-lay cell preparation and post lay egg maintenance e.g. brood food. I've read a little but no way enough, on this early stage in terms of housekeeping for non-foragers (Cushman's "Early life of the honey bee egg" for example) but my limited husbandry knowledge and intuition (always dangerous) whispers the logic that nursing ie dealing with hatchlings, newly emerging bees, takes the brunt of effort and numbers over early stage task attendance? Or is that just a wild assumption?
But this "rushing fool" is going to persevere with the one colony and see what happens, fully prepared for problems as with any experiment. Contemplating on this, I think I'll check on frame populations in both BBs on a weekly basis (I know one of the standard benefits of Demaree is the lack of need to check the lower n BB with HM doing the business in all that space at least until a frame manoeuvre 'roll' is necessary) and look carefully if activity in both chambers looks healthy when it comes to nurse bee, numbers and behaviour.
PS I'm particularly interested to see what happens with the super, remember it was fully drawn but empty. In theory there should be no change as one imagines the foragers will operate independently to serve the strong flow thats on. Might the younger nurses stay so for longer before their move to foragers? Nectar and pollen is coming at such a rate in this flow I doubt I'll see the difference. But if the JBM fears are founded, what will we see?