This adapts catiav5ftw (https://www.thingiverse.com/catiav5ftw/designs) 3D Printable Jet Engine (https://www.thingiverse.com/thing:1327093) to a motor.
Nuts: M3 (two)
This gets superglued into the LPT shaft (Aft) and the motor connector attaches to the Nozzle inside the nozzle cone.
motor_connector.STL | 50.4KB | |
shaft_connector.STL | 28.2KB |