Like Allen all my brood boxes have 3/4" holes (2 deeps+1shallow)
> where do you get the plugcaps for closing the holes
A 3/4' dowel cut into 1"+  lengths, with screw to pull them out later
In winter only the top hole is open.  No top entrance
Many of the supers have holes too, bees seem to prefer 
a hole as entrance

dave

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