Its happened twice, but not under the kind of controlled conditions I'd want to call it reproducable. Neither did i take the time to carefully note the levels of the trim tanks, however to the best of my recollection they had only minor changes if any.
I'll run through some iterative testing and report back.
On a side note, if this was caused by something like too much positive boyancy, should there perhaps be an audable symptom such as the tank flooding noise tailing off (as opposed to the deepening slosh-and-thump of a successfully flooded tank) to indicate that without the boat starting to sink, the flooding also slows to a halt?
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