Not a complaint, but really a heads-up to those concerned about low frame rates in P3DV4, who may be baffled at times, as I was. Running a 1070 GTX video card, attached to a 4K TV (main screen, set to 30Hz refresh), and a second 21", 60 hz (fixed) Acer 1K monitor. The second, smaller screen I use for monitoring hardware and tasks during tests (MSI Afterburner, ProcExplorer) and for ATC (PF3 or Pilot2ATC) when routine flying. PD3V4 is set internally to VSYNC ON, Triple Buffering ON, Frames U