Can't help on the electrical/electronic stuff, but would like to note that PC Lap Counter makes use of Pit Pro in a different way than SSDC. What the LEDs show is entirely up to the software controlling them, as they are "dumb" when connected to the PC. I believe PCLC uses them for penalties as well as fuel and pit-lane indications. I don't think it would be possible to have one row be a fuel indicator for a driver AND something else on the "board", though. Since they'd be parallel, they'd each show the same lights. Also, Andrew already has a hefty to-do list. I would be surprised if changing the way Pit-Pro works would get any work time for a good long time.