The first set of blinds, having been trimmed, now fit in the window and were installed on the second try, as they had to come down to have the strings untangled. The second set of blinds were just enough shorter than the window that they fit (barely!), but had to come down and be put up again as one of the strings was jammed in the mechanism. This set got to taste blood (daisy_knotwise's from a string cut), but are now docile and hanging where they belong.
All of the rooms where folks will be staying in August now have light blocking shades or blinds. Yay!