Tony, I'm wondering if you couldn't help it to "migrate" much as we do with zoos and xenia. When my 'tree/colt' attached its main stalk to an adjoining rock, I had to peel that away carefully - there was some damage, and it healed fine.
What if you put it firmly against another small rock at or near the base, and wait for the inevitable attachment? With two points of contact, you could pry the base away with some leverage, which would be needed in dealing with the slippery leather. Otherwise you might have to undercut the base to get it off - I can't see it "peeling" off at its root without difficulty.
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Alan
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