Noticed balls were jamming in the ToM outhole/plunger trough occasionally, causing multi-ball to miss-count and not always putting balls into the shooter lane... Balls were magnetised so replaced with new ones and also have a pinbits plastic trough protector fitted. However, balls still jam occasionally and need a little cab shake to make them fall into place. Is it likely the trough itself has become magnetised enough to cause the jamming? If so, any way to de-magnetise it? Seems first thing to try without buying a new trough. Ta.