I got about three hours of frantic cutting, drilling and grinding done this evening.
All the horizontal and vertical stringers are now secured, along with three longerons along the top for dealing with tension force. As there is compression on the bottom caused by the weight cantilevering over the front skid four metres back from the tip of the nose, there will be a lot of compression on the bottom, particularly closer to the skid. The rear former will need to be reinforced with a solid plate/mounting points. More on that when I get there.