Regardless, any of the ball type (and disc type) have flaws from tooling etc.. I also remember my IBM balls getting clogged with residue and I cleaned them with a needle. Where are the flaws in these memos? I don't see them? How likely is it that they were done on different typewriters. Killian didn;t type them himself. With those comments (sugar coating..going upstairs), you know damn well he typed them himself.
Lordy, I feel very old -- I used to use a safety pin or an old toothbrush to get the gunk out. (I tried a toothpick once, it splinterd) The younger folks don't know all the fun they missed! This thread has been great just to remember all the old equipment I thought was the bees knees at the time.