Yes I have. With the key is turned to the right as far as possible, around the 2-o'clock position, everything is very solid. The wheel feels solidly fixed to the car.
For what it's worth, the overall condition of the car and spare tire is very good, so I don't feel that anything is rusted in place.
I don't understand why the lock can be pushed inward about 1/4". It springs in-and-out. If you look at a photo of one of these locks, it appears that the lock should have a spring around the outside of it, but I'm not quite sure what it is for, other than perhaps to take up any slack to prevent the doughnut cover piece to not rattle?
Furthermore, because the wheel feels so solidly attached to the car, I'm guessing that lug nuts are used to hold it to the spare tire mount?
So what is the lock for? To keep the doughnut trim piece in place to cover the lug nuts? If this assumption is correct, then with the lock moving in-and-out 1/4", I would think the doughnut trim piece would be a little loose, but it isn't. It will spin, but does not want to move in-or-out.
This setup looks like what I have:
https://www.popscreen.com/prod/MTgwN...own-Cover-Nice
Again, I'm somewhat guessing since I don't quite understand how it all works together, which is why I posted my original message.