I'd like to buy a see through crown board for one of my Langstroth hives, would anyone know were I could obtain one or have a very simple plan on how to make one.
Because Langstroth is top bee space, a simple sheet of clear plastic, cut to size, is all that is required.
Best bet is simply to have a no-hole see-through cover for normal use.
That way, it doesn't even have to be stiff enough to support anything more than its own weight.