Quoted from vid1900:Bally made those 2 different length post screws for their 2 different sized plastic posts.
The 1" posts take the copper color ones, the 1-3/16" posts take the zinc color ones.
They plated them 2 different colors so techs would not mix them up.
Over the years, don't be surprised when the wrong sized posts are installed all over a playfield.
Many games used both size posts (like SBM around the horseshoe).
bally_posts.jpg
Exactly, I ideally need a short/long post map for Fathom to know how things should be.
-mof