Along with the breasthook I spent about a day carefully fashioning and glueing a mast step, this had to fit over a floor and two timbers and be a snug fit to bear the weight of the mast; it is a thing of beauty and as I stood back and admired my handwork feeling smug and self-satisfied, I suddenly realised that I had fitted it at the wrong place in the boat, Yes it helps if the mast step lines up with the mast!
To compound today's little catalogue of errors I have also found that I miscalculated on the depth of the deck beams so we are into a fair amount of correcting work there as well, although fortunately the principle beam that supports the mast and which everybody can see is actually fine, so while an annoying and really unhelpful delay to proceedings the need to correct the mistake will have no cosmetic impact.