With the Scanner and the Builder you will now be able to correctly copy structures *including* rotation and correct meta:
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Is this whitelisted by block type? (The metadata copy)
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No, it is auto detected
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Replying to @McJty
How does it know that it shouldn't recolour wool? (For example)

Sep 28, 2017 ยท 8:56 AM UTC

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Replying to @dsilverstone
Because when I get the ItemStack from red wool vs blue wool it will be a different itemstack. For stairs it will be the same
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Aah I see. (I'll admit I've not delved much into how these things work) That sounds excellent. Nice job