Inspecting stringers

[CT]

All mono hulls have the same structure CT two main stringers which box in the coffin than on either side of the coffin u have the triangle shape its all part of the integrity in shapes

All mono hulls do not have the same structure. And what is perched on a "typical" stringer layout varies wildly from manufacturer to manufacturer and model to model. You still have zero evidence that the photo provided is actually a stringer, vs. a support structure perched on a stringer or something else all together.

[gazza2006au]

I think that plywood is structual how else would u explain such huge cracks? The cracks are so big because the hull is flexing its moving so much the cracks appear as wide as a grinder cut mark