TINY TRAK 18mm Drive Wheel Micro RC Tank

Have you heard of the Tiny Trak? If not, you should make one! It's so cute!

I got the wheel file from here, it all started here.
https://www.facebook.com/groups/181517579149618/

However the original file require glueing the drive wheel to the servo shaft so i made this that has a flat spot, therefore it won't slip and requires no glue.

Step
1. Print the file
2. Use a knife the scrap the edge of the middle hole as shown in pic
3. Cut a flat spot on both side of the servo shaft. STA