That Glyder looks like a hot little boat! By any chance is it a design that can be built from plans in wood? Where would be the best place to stretch the hulls .3M? Between the beams, at the bows, or the sterns?

I find it interesting that they stick with ~7' width. Are the roads just wider here in the US, allowing for 8'6" wide boats without the need for a tilt trailer?