Quoted from DumbAss:This is the opto tester follow up. It is only partially implemented. The indicator board is in fabrication at the moment but the prototype for it works (as previously mentioned). These testers are specific to measurements of the Williams original boards. The new redesigned boards have this feature integrated onto them.
Firstly though ... I helped someone with problems on his Indianapolis 500. Turns out there were two issues. They were a GI wiring issue and R260 on the power board. When those issues were solved I ask to borrow the Illuminated Target Board so I could reproduce it.
Have a look at this board that is NLA... any chance you could make a version with the wider opto to avoid breaking the tab on the targets?
