I have noticed two bailer holes in the transom one for the main cockpit(on centerline) and one that looks liike it drains the inside of the hull area..this one the lower and most starboard..the question is I had to take off the nylon plate w/two screws to get a stopper to fit, didn't wanna use a carrot or cork,it almost looks like it doesn't take one but sure it does...and is there a schematic on how to change the sheet for the center board?