I have a pilot cutter with internal ballast
a length of scaffold tube full of lead the battery
for the winch
control sits on top of the tube. I have sailed it in fairly strong winds without problems of stability
though she will heel over so that the gunwales are in the water or even just under, our pond is on the coast of the Bristol channel
so as you can Imagine the winds come straight in of the sea where the originals once sailed. The original boats were excellent sea boats they were sailed by one man and a boy once the pilot was rowed across to the waiting merchant ship.
Hope you have as great enjoyment sailing
your boat as I have had with mine, one word of caution you should warn your fellow pond users not get in the way as they do not turn to quickly and if you hit another boat with the weight
of the keel and the power in the sails
you will inflict damage.