Hardware not required and I definitely wouldn’t recommend it.
Attach your pull down rope via small carabiner or any other method behind the knot on your rappelling rope. Works 100% of the time. Knot comes down first leaving nothing to potentially snag in the tree.
You’ll be rewarded with this image at the bottom of the tree.
Knot pictured is a figure eight on a bight with a double overhand behind it. The small carabiner is rated but that’s not necessary. I like a rated carabiner because it gives me a backup and weighs almost nothing.
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