I believe this was the root cause of the problem looking back. The screw was definitely shorter than normal and had slightly tapered edges.You did have the little allen screw in ?
Thanks ill try to use the 1.362 to match something up!1.362 inside diameter.
Another option I know a few guys do is use 2 of these for bully drivers https://kartclutches.com/#!/Retaining-Ring-SMC-Sprockets-Part-No-4037/p/39352923/category=10202123
which is basically the same as to what I’m doing but way easier to change.