Today, I had a spool that was reaching the end of the roll, thinking that it would auto refill with the other spool that was brand new,
Instead it got stuck inside the AMS lite gear assembly.. So I disassembled the AMS lite slightly and removed the filament stuck in the gears, I reassembled and it kept doing this: 
If you can’t see well through the grainy GIF I uploaded, the big gear isn’t turning the tiny gear that pulls the filament.
I’m guessing this is a pretty common issue with the ams lite and I am hoping that I won’t need to buy a whole new gear assembly thing. 