We probably needed to change the fins so they would be a bit bigger then the regular ones and needed some weight in the nose of the rocket.
My team mostly collaborate well and didn't really fight about making the rocket, but mostly the whole rocket I made and most the time it was fun to make and I had to plan it and that bit was really boring. So if I do this again another time I would want more help in my group want them to not talk as much as my group.