So you do know that you can adjust the sim rate correct? It is done so using the R+Ctrl+(either) +/- to increase or decrease the sim rate.
I’ve noticed that in default mode my cockpit clock appears to be just a little fast whereas a true second of time is about .8 seconds on my clock. But if I hit the R+Ctrl- keys it slows it down to whereas it takes almost 1.5 seconds on the cockpit per true second.
It would be good if there was a way to calibrate the clock to accurately produce 1 sec./sec. but if there is I’ve not found it.