[HurtLocker]

Inside public OnPlayerKeyStateChange when a player hits Lshift button, along with the speed boost, a timer starts which changes a bool variable. In a second this bool returns to its initial state (example: new AltPressed[MAX_PLAYERS]). You use "if" to check if 1 sec has passed. This is the 1 sec idea. For a RP server 1.25-1.3 velocity multiplier is just fine. But because you will have that 1 sec prevent, perhaps your multiplier should be even bigger.