Any suggestions on how I can fix this Aerotech Initiator nose cone? I was very disappointed to see this huge gash in the kit I just opened. It appears as though the Mantis legs gouged it because the box itself is perfect. It is too deep to sand out. I use wood filler on spirals for other projects but I am not sure how it will work with plastic. My first G motor capable rocket is off to a rough start. Thanks in advance.