Quoted from Koos:I was aware of this but thanks for the heads up.
My local parts retailer sells normal Superjets and a “special low magnetic” version for use in pins with magnets. Does this makes sense? I do trust this retailer so if he specifically mentions this I assume it shouldn’t be an issue.
And thanks for confirming the amount of balls.
Silverjets, Titan Shiny, PB Life's old Oooh la la, and Ball Baron Ninja are ALL chrome pinballs. They will ALL magnetize over time in games with heavy usage of exposed magnets (Dialed In and TZ namely). There is no such thing as a "low magnetic" chrome pinball. Low magnetic balls are carbon pinballs. They are darker, less shiny, softer, and cheaper than chrome balls.
Having said that, I now have 440 games on my MET with Ball Baron balls, and no magnetism or weird issues to report. Prior to that, my MET ran 305 games with Titan Shiny balls, with no magnetism to report. I am not aware of anyone using chrome balls in their MET that has developed magnetism issues affecting game play.