double duty solution ...
We solved the gap problem by DW making two large tube pillows, stuffed with her sewing scraps, ... they are very dense, not soft and mushy, and are a firm fit in the gap so they stay where we put them and will not slide down easily, ... we also use them to fill the gap behind the sofa when the bed is up and the sofa is usable, ... we cover them with two large beach towels which also double as a cover for an afternoon nap on the sofa, ...
also, about the abyss at the head of the bed, ... the end paneling is very thin, can be easily cut and removed to access that area, then returned after retrieving whatever may have fallen into there, ...
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