Bar Knecklace Jig I used the ones from here https://www.amazon.com/dp/B0DF2PKDCV
(Not an affilate link, just a link to what i used)
Circle to the top and the center nub is the same height as the bar for focus
You can fing my .3mf file on Makerworld at: https://makerworld.com/en/models/1070751
Settings I used on the Xtool F1
IR Power 90%
Speed 800
Pass 2
Lines per CM 300