Hi, I think yes, your suggestions helped, thanks again.
I still need to set Vsync to ON in NCP otherwise I get screen tearing and if I pop the ATC screen out to the second monitor I still get CTDs.
So to sum up I think that if I want FG - DX12 - HAGS On I should not be popping ATC to a second monitor otherwise I should be going for vanilla DX11 with HAGS off and no FG but then I can be popping the ATC window to the second monitor.