Brushless DC Motor

This motor is for a university project (ENGR 320, University of British Columbia Okanagan Campus), where I am a third year mechanical engineering student. We are required to design and build our own electric motor of any type. I decided to build a brushless DC motor, in an in-runner configuration (rotor spins inside the stator). This project has consumed a lot of my time and has been a lot of printing and reprinting for tolerances. Here's a list of material I used and what for:

Stator Shell (casing) - Red PLA, 0.2mm layer height, 30% infill
End Caps - same as before, more infill as the bearings locate in this and support the shaft
Stator(inner) - Protopasta Magnetic PLA where I wound the 6 coils
(this is split in half because it would be almost impossible to wind otherwise)
Rotor - Black ABS, 50% infill to save on weight but create a strong part
Shaft - 5mm stainless steel rod, (may be a good idea to use AL as its not magnetic)
Bearings - 5x11x4 RC bearings
Windings - Delta c