Symmetry, asymmetry, bathymetry ...
Do not know about asymmetry but seen hulls deformed by bad choice of support devices and their wrong location. One was a crap hull built in Spain
(guess no structural support inside at all), the other was a US built boat commonly considered to be a decent builder
Our hull flexes ever so slightly (not visible unless you look very carefully over the natural curve of the hull) when a less than trained at all boatyard hand places the support exactly half way between internal athwart supports - but only if they tend to pump up the jack (which is actually not necessary as the boat is resting, is supposed to be resting, on her keel). I move such supports to the right spot (which is clearly marked and apparently has been communicated to the hand prior to lifting the boat).
Otherwise I noticed slight deformation in the engine
area - I can see this when disconnecting and reconnecting the train. As the book says, this kind disappears when the boat is back in the water
. I found the book to tell the truth.
Our hull is very, very rigid I think - solid and thick laminate designed in 1967 and built in 1980. Specs to Lloyds.