If you make the top bar the same width of the dummy board, there is NO BEE SPACE. I use a top bar with three screws to the dummy board. Plenty of bee space.
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On Mar 22, 2020, at 2:58 PM, Geoff Manning <[log in to unmask]> wrote:
>> We find that the ideal dummy board is made of 1/2" marine ply (which does not de-laminate) with a top bar of the same width screwed and glued to it (hardwood is best as it is stronger).
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