Hopefully you got the newer version of the PLX AFR (Air/Fuel Ratio) sensor. I need to update mine. I'm stuck using the older Bosch sensors, which don't last very long with leaded fuel. Pretty much every oil change, I can count on replacing that sensor.
Although, I will say, once you get the EFII system dialed, the AFR info becomes less important because you'll know where it is based off your fuel flow anyway. It's amazing what just .3 gph can change on the AFR.
Panel looks sick! The 650 combined with the G3X is glorious. It's like cheating