This fiber-reinforced urethane drive belt is very tough and long lasting. Properly adjusted, it should last for many years of use. If you should accidentally cut one, it never hurts to have a spare on hand to save down time. The same drive belt is used on both the lathe and mill with the DC motor.
All of the documentation and SD card files are on GitHub at the link below. Soon we will have a folder for user created M100 programs that leverage the Backpack's capabilities like setting the computers time/date from the Backpack's RTC.
for th eBackPack GitHub page.
This is a 'Quick Start' video showing basic Backpack operations.