Please bear in mind that the chances of a side to side roll over is very rare in any multihull but an end over end while skating down the front of a high, steep wave is where the multihull is more apt to flip over. A much higher chance than the monohull, either ballasted or not. There's just not very easy way's to compare the two as they are two completely different animals. V. Jackson Canatsey Captain Ret. Casselberry, FL canatc1@juno.com