We had to find a nose cone that fit the exact diameter of the Pringles can that we chose. The pieces have to be glued together with 5 minute epoxy. The more rockets I built, the easier it became. I have built 4 rockets of this type and plan to use all different materials for my next model. Old Man is the first rocket I built.
Nose cone is made from bridal boquet holder.
A perfect fit is snug, but not so tight that it won't blow off an deploy the parachute. The first parachute was made from plastic gallon bag and dental floss. These materials melted on our first launch, so we altered the design and used party streamers and nylon, elastic cording. I also improved on my wadding to prevent the heat from reaching the parachute. My first payload container was a film cannister.