My Vega lives on fresh water so not easy to determine whether leak is from rain, water tank, toilet or engine inlet, or even condensation.A small amount of water collects inside the starboard cockpit locker just inside the vertical wooden support for the starboard bunk (where the inside of the locker/inner hull meets vertical support).This appears to then slowly leak across the saloon sole into the upper bilge (battery location) and then to main bilge from which it is pumped out eventually by the automatic 12V bilge pump.I've checked (with talcum powder) window seals and deck fittings and those seem ok.Obviously the cockpit sole seal is an obvious suspect but even if seal was faulty could rain water get from there into starboard saloon locker when boat is on its berth?I think that there is a tube running from starboard saloon locker to bilge?I'm starting to get obsessive about this - I just don't like leaks in boats!The auto bilge pump makes it difficult to assess the amount of water involved (a cupfull per day????) and the relatively dry warm June weather removes most of the lingering evidence.The boat is strewn with talcum powder (baby changing powder)!Any suggestions? I'm considering pouring water coloured with different coloured food dye (at different times) onto different parts of the exterior and looking for coloured drips in the locker..Is there a better way?ThanksJohn V1447 Breakaway