I was lucky to have has a successful flight with the Rosenfield Aerospace 3 D printed fin can system. It is a 3.0-inch diameter 3D printed fin and tail-cone system. The rocket was launched on a 38mm Aerotech H130W-M reload and it was a picture-perfect flight:
The rocket was light and gained some good altitude.
It is always a good idea to have a checklist. Especially when preparing for a day or a weekend for a rocket launch. Here are a few ideas: