Here is my attempt on installing VBXE into Incognito Atari 800 this is rather how not to do it, since space inside RF shielding is very limited, but, with a proper slot-3 adapter board it should be a lot easier i'll publish some more detail plus required JED update a bit later, as i'm still waiting for some feedback from other people attempting this installation also - updating JED should make Bit3 card working