We are looking to buy a 2002 Catalina 310 and found one in good condition except it lists to port. very noticeable, about 10 degrees. have not bought the boat and won't until we figure out how to set it straight. There are 5 deep cycle batteries on the port side, weigh about 60 lbs each so 300 lbs. I guess the owner wanted to run the TV and microwave while at anchor? Anyway it takes 300 lbs on the starboard side to get it level. I know the boat is only supposed to have 2 batteries on the port side from the manual. Any ideas?