I spent the morning today checking and double checking the alignment and squareness of the station moulds. 

The moment of truth came when I dry fitted the keelson and it fell into the notches perfectly. I just had to make a small adjustment for station 2, otherwise everything lined up well. I still have a few more braces to put up and then I can get started on the next steps: placing the floor timbers, cutting the slot for the centreboard and the gluing the aprons to the keelson.