The way we use is to stand the bottle up exactly straight, have one person on the floor hold it straight and slowly spin it, while someone else watches from a distance and straightens the unattached nosecone if anything looks off. Then, when everything looks perfect, put your hands in a ring around the tip of the nosecone, and watch it spin. It should stay in the exact center, and rotate perfectly. After that's done, attach it to the bottom with a small strip of tape. Do the hand-rotate thing again, and if it still looks good, tape it all the way around. Takes about 15 minutes until you get the hang of it, but well worth the extra seconds.
"The stars are beautiful because of a flower that cannot be seen." ='( -Le Petite Prince
Wright State/Magsig/Piqua Regionals/Ohio State
Disease Detectives - 3/3/2/1