I already have a Zumo as well as a Boe Bot.
I would like to buy/build a mid sized differential drive robot.
Something larger than the say a Boe Bot or Romi but smaller the the Wild Thumper or Arlo Robot.
Pololu carries lots of options for wheels, motors and motor drivers etc. that might work, but I don't see a mid sized chassis option.
What wheels, motors (with encoders), and motor controller would you recommend for a mid size robot?
Any suggestion on a chassis?