XPUIPC isn't great, there's a lot of data missing, especially since I've been finding a lot of addons are not setting the standard datarefs. I've got a special config file which maps datarefs to what I consider aircraft "features" (e.g, landing lights, nav lights, etc). I'm expanding this same method over to P3D, it makes it easier to support different/new aircraft. Development has been a little slow lately but I think it's about 90% complete. The last 10% takes 90% of the time