After contouring the framing of the first half of the vertical fin on the building surface, Eric glued the sheeting down. After sheeting, the laser-cut Vertical Saddle is inserted below-, but flush against-, vertical rib 3, and then pressed/contoured against the sheeting and glued. Afterwards, all but about the last inch of the rear section of the sheeting is trimmed away, matching the same airfoiled shape as the vertical saddle.