It would seem we are on a roll here.
I think it makes a strong case for stress relieving these old souls, they were not really rocket surgery driven in the design or manufacture.
While done fairly well, I think the cutting edge technology of the time was applied sparingly "we know what we're doing, it will be fine".
They really were done very well, few applications where the majority of such parts are still going strong 50-70 years later.
A few minutes with the file and emery cloth would be time well spent.
