I even remember thinking, "This is pretty ambitious, I should work up a schematic before I get to soldering." I couldn't wait, I just dove in to the assembly. I got to the end, it was very pretty, but I managed to wire them in blocks of 2. So, though I had 8 displays, I could only display 4 discrete numbers. "1234" would be "11223344"
Argh! I'll try and remember this lesson.
Not a total loss, I did learn something about designing things on a "sea of holes" protoboard.