I have been debating for a while now about fitting a keel drain to our rib. I didn't want to disturb the transom especially below the water line.
I did post a thread a while ago about it as I couldn't believe that the anchor locker had a drain but I could find where this water would go to if it got in.
Well I have now found out, I purchased a stainless steel drain plug fitting and have now drilled the 32mm hole. I then watched as the dirty water that is probably 12 years old drained out.
The new redbays and many new boats now have either a drain in the keel or a drain in the transom well so for those folks don't worry, if you have a similar set up there is a chance that you too will have water in the hull.
Letting it drain out and dry out today and will then fit the drain plug tomorrow.
Feel better now as it is worth the peace of mind