Originally Posted by Calhoun
Neither of those is standard for a late 50’s 99. The flat headed stud was standard on the 1930’s 99RS, and could be bought separate in the late 40’s and 50’s.

The 99R in the 50’s had sling eyes.

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Is there a particular swivel to go with the flat headed stud? That might be my best option. If I try to replace the flat headed stud with a sling eye I may create more issues than I have now. Thanks for the book suggestion. I bought one earlier this year and enjoy it very much! Mark