Mine came with AP1_P100 on mine. I loaded AP3_P100 onto mine and it looks the same so I think XX_P100 is the latest and greatest and includes all the tweaks and fixes, but don’t quote me on that. If someone could confirm? Seems a lot of people state that the default firmware is rubbish/useless, but I think those posts might be very old now. I’d like to know if xx_P100 is good to use or do we need to look at the community firmware (GCC, marco sinati etc). Seems tho to try them we would be downgrading everything so it feels like to me the P100 is the latest. Its not clear if the manufacture is using the community contributions and putting them into the latest device. Anyone know what is the difference between AP1_P100 and AP3_P100 ? I can see that XX_P100 has a new GUI over older APP v2.53