There are 2 lugs, top and bottom, the head tube is brazed into the lugs. The lugs don’t dictate head tube length in any way.
I dunno, I am not a frame designer, but that's what the frame designer says.
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@Belagerent started
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There are 2 lugs, top and bottom, the head tube is brazed into the lugs. The lugs don’t dictate head tube length in any way.