Agree with the above. I put 5 standard nuc frames into a 14x12 box for a while. Yes, they do build drone comb along the bottom, yes, it does sometimes get stuck (with hilarious consequences). But it's no great problem. I have now gradually replaced the smaller frames by simply moving them gradually to the edges, then shaking the bees off and replacing them with new 14x12 frames (which I would have wanted to do anyway to keep the brood area nice and open).
One tip: I found that if they've gooed the hanging drone comb onto the floor, you can gently slide a palette knife in through the front (assuming there's no entrance block in the way) and slowly slide it around against the open mesh (or solid, I expect) floor. Likewise the sides. I found that it was best to do this either first thing in the morning, or in the late afternoon, when there weren't loads of impatient foragers trying to get in and out of the entrance. These times are also better if there's a danger of exposing some honey, which they also sometimes put underneath at the sides. Doing that in the day, with the entrance block off, is asking for robbing problems and defensive bees. But my bees were fairly patient; I wouldn't like to try this with a really fierce colony! And you could always reduce the wild comb problems by "trimming" any hanging bits of comb each time you inspect the hive, assuming the bees will let you....
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