I opened an Aerotech 38-240 reload kit in march, anticipating that i would use it during the launch. Unfortunately, the weather took a turn for the worse, and I never flew it. Since then, the motor has been sitting in its original bag, taped shut. My question is, Is there a time limit to how long a reload can be opened before use? I know i might have to sand the core a bit if the AP is oxidized. Is there any other precautions i should take before using the motor at an upcoming launch?