Quoted from ForceFlow:
P3-ROC can only use an LCD as display output and uses direct switches, rather than a matrix. In that situation, you would likely have to scrap the wiring harness.
If you were starting from scratch, the P3-ROC has some benefits over the P-ROC since it was designed just for that purpose.
I'm wanting to do something similar with a likely unsupported machine (exact machine is yet to be determined). My current feeling is that I would have no desire to use the machine's existing switch matrix, harness, or boards. For the sake of having complete understanding & control over what I'm building, i'd love to re-wire every switch and lamp for direct input. If my understanding is correct, the P3-ROC is what I want for that, then?
With the theme I have in mind, I'm hoping to use RGB LEDs for as many playfield and even GI lights as possible. Their direct input PD-LED board claims to only support component style LEDs though, not the standard pinball style bulb. Am I understanding correctly then that I'd have to use the 8x8 matrix boards for all lighting if I want to use standard pinball bulbs? I suspect it would be far cheaper & simpler to use direct component style LEDs, but what would you say are the pros/cons of that approach?