I've recently bought a 2012 Sundancer on Lake Michigan and will be moving her to Lake Winnipesaukee in NH come spring. I need to convert her sinks and shower to containment for Winnipesaukee. I did this myself on a 2005 260 at my home (trailerable) and it wasn't too huge a task. The 310 however won't be near home so I've either gutta have the Marina staff do it $$$ or work remotely. 3 hours from home. The 260 tank was easy to get to, the 310 tank is starboard and aside of the genset. I don't recall when I looked at it in October if it had an unused fitting atop the tank that could be used to dump into. What I did on the 260 was to hose the 2 sinks to the shower sump and I hosed the sump discharge to a fitting that I added to the tank top. I just hosed the wet sink drain directly to the tank with an improvised "trap" (low sag in the hose) for odor control. I'm posting this here to see if someone maybe has BTDT and could offer some advice. Dunno if I'm gunna be able to route hoses from the sinks to the sump without boring holes and can I get from the sump throug-hull to the tank without a lotta grief.