Yep bought a Hyperball with a couple of issues....
when I got it home the 4 segment credit display had decided to stop working
I believe its the same Slave display fitted to most Sys7 games and poss right up to some Sys11,
with the ribbon connector not the edge connector
Luckily the Pf alphanumeric display is good in this Machine.
A spare 7 Segment may be a good idea too..
Peter..