I just upgraded my v-core 4.0 to 4.1 and did a new install of RatOS RC4. After the initial configuration I get an error saying that the filament sensor button was pressed. I cannot seen to clear it. I checked everything I can think of. I am using the orbitool O2S and a orbiter filament sensor with the jumper that came with the orbitool kit.
I will post a couple of pictures in a few minutes.