Great question!
It is already added. Just pull the pulley out and the belt will lengthen automatically.
thanks, also it would be nice if the motors could say if they are speed centered or torque centered
Agreed. For now, if it is a real life motor (i.e. the Motenergy 0708), you can look up the torque and speed characteristics of the motor online. Eventually we are going to need to make the numbers visible to the players.
ok thanks