Rudder and brasswork   The rudder, and various brass components - from left to right: bobstay sheave, eyebolt, pin & locking cleat, bobstay cleat.
At top centre, the stages in making the main halyard sheave

Note the 0.3mm diameter hole in the left-hand rudder pintle. This is for the split cotter-pin which prevents the rudder rising in the water.