So in August 2019 we put up some beams which make a big X at about 2.7m from the floor. The beams will help to stabilize the building. One is 7m long and the other two are 8m long, we managed to lift them by building two Jenga style platforms, pushing down one end and adding a board to the other, so bit by bit they went up. There will be more bracing from the wall posts to these beams which will be done when we are sure of the interior layout.
From above
Half dovetail joint at post
Pine tree roots of centre post