There are so many variables to this. Quite a few of the original users trying to figure this out have their printers on pretty solid surfaces (paving stones, overbuilt shelving), and were still getting the VFA. That is a whole 'nother rabbit hole to run down, and has been by YouTube people that have done this up to and including suspending the printer in the air upside down, and not been able to establish any particular key to cure.
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