I want all my boxes to be the same size , so I am trying using brood as supers, important bit next though, I am new to all this and have not had a full season doing it so it might be folly.
The pluses for me are that you can move frames of honey in to the brood boxes for example if stores are required in a weaker colony for instance.
As for weight, why move an entire box when you decant frames individually. So IMO weight shouldnt be a problem. If it is though why not use all supers instead of all brood?
You can use any box or frame for any job, not have one set of boxes for supers and another set of boxes for another job. so hopefully have less equipment but still enough
I would not think you will get any more honey just because you have put a larger box on though.
If you intend to go down this route I suggest reading Tim Rowes book "the Rose Hive Method" (
click here for a link to the book on a site). He advocates using one box size but using his hive design. IMO the hive boxes you use are irrevelant as the concept can be applied to any hive IE nationals, commercials, langstrof etc...
I have read the book and I found it interesting and informative