It took my a couple of attempts to reach 100 mph and finish the Re-Record scenario in #TrainSimWorld4 What lead to success was to run the #FlyingScotsman with 50% on both the Reverser and the Regulator. Just tooting in case someone else is struggeling as well.
Credit: https://forums.dovetailgames.com/threads/flying-scotsman-tip.73674/