Centipede Trackball info for the thread:
Here is a brand new Cue Ball compared to an original Centipede ball.. The original is a little yellower with age
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The cue ball vs. white ball with the Happ replacement assembly..
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And while I was swapping the Cue ball into my bench controller...
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Cue ball 162.7 Grams
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Plastic ball 121.3 grams
My original Centipede ball was ~158 grams. Centipede does not play correctly with the plastic ball, the rest of the replacement Happ trackball is just like the originals from 1983 (+ ground wires). Just buy a Cue ball and it will be 100% if needed.