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by _Microft 1969 days ago
You are correct. There is even footage from a test on Youtube. Thanks for pointing this out.
1 comments

You don't want them running for long on full power, but it's probably OK to use them for slowing down an emergency landing if the sea-level engines become otherwise unavailable. The alternative, as we (and SN10) saw with SN8 and SN9 is not great.