Bill,
Swienty makes an extractor specifically for top bar frames (108600 WORLD
EXTRACTOR). It is a rotating disc upon which the frames are laid on their
sides--bottoms facing out. The honey is then spun out as it would be in a
parallel radial extractor, except on a vertical axis, and with only three
frames at a time.
It is pricey, but something similar could be fabricated locally.
Randy Oliver
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