Slammer III series bail wire changes are online.
Still working on editing the schematics, but all of the parts have notes
and the design change info is at the top of each reel's parts section.
https://www.mysticparts.com/PennParts/Spinning.aspx#SlammerIII
Penn changed the system from a line roller bushing to a bushing and a ball bearing in the line roller.
So 5 or 6 parts are changed, depending on the reel model and what was on the early runs.