> Frank, there is one small advantage for using deeps for brood
> chambers.  The honey arch bees normally locate in frames are about
> the same size whether the frame is a shallow or a deep.  This means
> that a larger proportion of the frame is available for brood in a
> deep than in a shallow.

This statement needs a qualifier. This depends on the strain of bee used,
evidently. I have seen bees that fill deep frames of comb entirely with
brood, no honey stores at all. I, myself, have converted this year to all
medium supers. A lot of the brood frames have little to no honey cells. Some
are mixed, but most frames in the core of the brood area are solid brood. If
you would like, I can post photos of this.

Regards,
Barry