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Haven't done it personally but have read of others doing it. As usual the devil is in the details, you need legs that are solid enough to hold it. To make some accomodation for the bottom (spike into it, or add a mud plate, etc.) and if you are tying to a piling or seawall or dock, to be well-fended.
And of course, to secure things on the boat so that if you should go over, it won't flood you below. I think I'd plan the first time in "half draft" to see how well the legs held without placing the whole burden on them, then try a second time doing no work but just seeing they held up the load.
Bear in mind that if your stern tips down and you impact the rudder, that can do a lot of damage, so if there's any chance of them, make sure the stern is up, or there's a fifth leg behind.