No, I am about 6 foot tall and weigh 180 with all my gear on and if I turn my 5.2's mast into the wind and get my weight really low and far out it has always come up.

Also I turned over on purpose in dead calm wind and was able to right it but it took a while.

Once you go cat you never go back! Nacra 5.2 (Elsies)#1499, running an inter17 spin!