setlistener() isn't the greatest for this application, but whatever floats your boat. It's your plane.
And it's nonsensical that it'd fail at exactly 100 kts, or between 99 and 105, or whatever. But, hey, maybe I'm not seeing the application, so there's that. I did set the Blackbird to unstart between mach 3.53 and 3.55 (in hindsight, 3.55 is probably low, 3.60 might be better), so maybe there's something I'm totally missing with this.
Anywho, I'm out of this thread. Good luck.