IMO
Obviously, since the cup was an extra part, it could easily be run with or without it. They also made clearies and games mibs, so, probably ran without a cup as often as not. The patches that people say "cup wasn't spinning" are the ones that look like they really wanted to cork, but, just didn't (up to maybe say an 1/8 of a turn). The seams don't usually have that 'straight, all the way across' look them like on planned patches. Like Chucks example. One wanted to spin, one had no plan to spin at all. "Lazy corks" would be the ones that made about a 1/4 to half turn - Chucks is more of a Lazy cork. .