I did these instructions by hand when I was about 15. As you can see, I didn't even bother to use a ruler. Amazingly enough, this was enough for me to rebuild the model... 16 years later. I didn't notice until I scanned this image in, though, that my newer version is missing the headlights. There was originally one trans-yellow 1x1 plate on each front panel, just inside of the guns.
At the time, I had thought that I would do this on a semi-regular basis. However, this remains the only model for which I ever did instructions by hand.