Originally Posted by
billdelong
...More specifically I was told that the pots and fets were upgraded, and I don't see any of those components on the bottom
The fets are visible on the bottom, right over the motor. It looks like a two channel PNP / NPN fet (SOIC8 package). But it might be hard to read what's written on it, due to the protection coating.
There probably won't be a pot, isn't it supposed to have a magnetic encoder? It's just a small magnet rotating above an encoder IC.
Andi