I have a theory about the burr comb, but someone will probably disagree. I think that when they are making honey, or storing nectar (or syrup), I don't know if they have control over how much wax they produce, but with the plastic foundations, and drawn plastic frames, they make more than they need, so they use it. Especially since until it's drawn, they don't really care for the plastic. If your in a heavy flow, they jump on it but you still get the burr comb. I tried some permadent foundations, and that colony is burred up pretty bad. Of course, some bees just make alot of burr comb. If thats a trait that colony has, I would give them a shot at some section honey next year. Nice white wax is a great presentation. Try to make their habits work for you.