The previous owner of my 93 C34 was very particular about the list to port. He always kept the forward tank full and has bags of sand in the storage behind the seat cushions. I've left the sand in place but we've decided to use both tanks after the forward one developed quite an odor when we emptied it for winter storage. I'm not sure if full tanks, extra tools or sand on board makes a difference in sailing performance. My full chain anchor line probably doesn't help either:)
Mark
Mark