On the HR41, the rudder post exits thru the aft deck, allowing an emergency tiller to be fitted. The problem is that water enters between the bronze axle and the nylon bushing and soaks the upper side of the head liner in the aft cabin. Water also runs on top of the liner and onto the inside of the hull, onto the bunks. Admittedly, only a problem in heavy rain or large following seas.
The solution is simple; build a cover. One small problem; the head liner either has to be cut in two or the rudder post has to come out (the post is fitted into a hole in the liner…).
Perfect timing to fix this was when we were renovating the rudder and had to take the rudder post out anyway. And then we cut the liner in two, so we can remove it more easily in the future.