I am a volunteer at Shake-a-Leg Miami. http://shakealegmiami.org/website/ We have had a very generous donation of a Beneteau 311. The boat was built in France and delivered outside the US. The head pumps overboard. We are trying to get the boat legal for US water. I have talked to Beneteau and they have been very helpful but I am having a problem visualizing where the holding tank installs. If any one has or could take a few pictures of the outboard side of the head compartment it might help. Our boat, aft of the sink has a hanging bar that goes to the aft bulkhead of the head and below it above floor level is a molded U shape that is integral with the side wall and sole. Beneteau was very surprised that they had built a boat with out a holding tank. In any event any photos of the holding tank installation would be appreciated. Email: kenkor@bellsouth.net