The config on my boat is a one off. There are no original parts. I used Nida-Core sheets and went at it...I too like the original non-skid on riffraffs config and the way he kept the deck throuh the splash well with the drains.
Mine has two drains at the aft corners before the transom boxes and they are routed under the deck though a one way valve and out a bronze seacock/thruhull. see here:
in side the two aft boxes is a pie plate gaining access to the seacocks (total overkill no reason for them)
it works well but I would rather have riffraffs design.
I am screwed if I need to replace any of my fittings I will need to remove the boxes in the stern [img]/images/graemlins/frown.gif[/img]
what do they say? hindsight is 20/20