I've got an rocket that I launched yesterday (Estes Longship) on an Aerotech E20-4. Ejection was a tad early, but the only other option is a 7-second delay. I'd like to find say a 5 second delay. Is it possible to modify the delay charge? I'd read here that some Aerotech engines can have their delays modified. I wanted to continue to use the E20 engines due to the slower takeoff vs say an E30. I don't want to get into reloadable cases, etc.