35, with sacrificial keels, sits 6 months at a time on the keels. It tends to deform so that the floorboards rock on the hard
, and even for a few weeks after launch. I have taken, in recent years, to installing jacks under the main bulkhead and the cockpit
door bulkhead, the bows and sterns, and just taken some of the load that way. Likely helping my mind more than my boat.
I'm sure the boat had no extra support when stored before I owned it (former charterboat), and it shows no damage from it.