Your knowledge on this is amazing thanks man and MTB I can't wait to see your pack it's looking so amazing. Mine may not end up perfectly screen accurate because I'm a prop maker on a tight budget but these tips help alot so thank you.Make sure your rocket boosters stick out more. There is a hole in the back that should match up with the hole on the tank. I know you chipped your rocket boosters but you can still align those holes. I hope. They need to stick out about 4mm from the bottom of the tank, and when you fold your flaps 90 degrees the boosters should sit right on the flaps.