Cut and tapered three tail pieces, two for vert tial and one for the rudder. Cut and fit the longerons to accept the tail post. Need a 7 degree slant, along with vertical and horizontal alignment. Decide it was better to epoxy tail in place before installing belly skin. Used digital level, plumb bob and a lot of sweat to try and make everything square. After done, vertical post may be off a 1/2 degree.