Quick printing, single-use rocket fins attaches directly to Type C model rocket motor.
This piece is a single-wall print (0.4mm nozzle) and therefore prints very quickly but is fragile. If it survives landing it's reusable...but don' count on it.
It fits tightly over the bottom of a Type B model rocket engine (no adhesive or tape required) and has a slot for the launcher rod.
The dowloade includes g-code, stl, and SketchUp files, feel free to edit/remix, but read the instructions for advice and to save yourself headaches! It's a very finicky print!

This model is intended to be printed with a 0.4mm nozzle and 0.2mm layers, Changing these settings can easily cause problems with the print as the entire print has only a single wall.
If editing/remixing be careful to keep the fins oriented on only X or only y axis, as you can easily end up with problems if they're on an angle (that's why I made 4 fins instead of 3).