A few things;
1> Either or, depending on personal preference, CB.
2> I looked for Mutlithreaded Optimization in my 169.12 drivers CP, but only found Threaded Optimization, which I switched to Auto.
3> Oh, my, flippin' heck! The engine doo-dad works!!! I'm going to try the weapons tomorrow, and have the vaunted ICT I have dreamed about for years!
That, for the non-TAC initiated, is an Integrated Combat Turn. Wartime generation? Land, taxi into the ICT area, get fuel, weapons, and even a pilot, if required.
Fire it up, and get in the air again inside XX minutes. Very cool stuff!
Did you see a refuel= in there anywhere?