I had one that i added a small drain for the inside of the hull. Always had to bail out the cockpit of it though. You have to drain the area between the hulls every month or so, or it gets too heavy. I guess water just condensates inside of it and builds up. I know mine would get heavy enough that 2 people couldnt lift it onto the dock.
Thanks Distant Star. I also have a Pearson, a 365 ketch made in 1978.
How did you add the drain to the stern section and how did you drain between the hull and liner?