Wonder if it was something to do with the magnets in both those games . It was discovered that Homepin Pearls should NOT be used in games that have magnets as the balls themselves can become magnetised .
I think this news will actually interest Mike as the Pearls were an idea from his offsider Sid . Mike wanted to produce just the Premium brand balls .
If you have no luck in contacting Mike then maybe get in touch with Tony Turner at The Pinball Shed in QLD as he was selling the balls through there .