I under super, IMO it don't matter, so what if they fill the brood comb above with stores, the queen will just lay in the under super and the stores will be where needed come Jan / Feb and she will have moved the brood nest up anyway, why have then shifting it all over the place ? It means more wax to cap. Main thing is not to use drone comb as an early spring burst will mean lots of wasted drones. I try to use drawn worker comb and if short put some foundation in, they often still want to draw some comb out over winter.
Cheers, Mick.
Cheers, Mick.