Ah, advances of tilted engineering :) ...
Seriously though - very elegant solution, every time I look at it. Thin roof (not like regular ply) is reinforced, panel is reinforced, everything folds down neatly.
Made my first 250W tilt-able. By the time I've made brackets for another panel, I realized 2 things: 250W is almost enough, and 500W flat is enough. So the second panel went on without easy tilting option - still could tilt, but tilting struts would need to be added and removed every time. In other words - no plans to tilt.