We took her out last week and had our naming boat renaming ceremony, we also enjoyed the presence of a nice sea turtle and a dolphin joined the champagne toast.
I have an 07 310 and duck bill valves have been changed but still having the problem you have with yours. Mine cycles about every 5 -10 mins. Flushed and holds water fine, having it checked out one more time. Will let you know what they find.