I was looking around for a differentially driven robot base, but none of them seems to ship with wheel/motor encoders installed.
What would it take to produce a more expensive 3PI configuration which has encoders built into the base ? I have hacked together encoders on various projects before, and its a nuisance.
Why does nobody offer encoders preinstalled or parts of a kit ? For any kind of precise navigation algorithm, you want wheel encoders, and optionally a single axis gyro+ accelerometer ( to implement a simple “gyrodometry” type of navigation , see google.com/search?hl=en&q=gyrodometry )