And from the second link :
If you set the crank length to less than 165mm and run 170 -175mm it's lovely! The motor adds power low down to compensate for you trying to set off with short cranks. So, when you have longer cranks fitted it feels like a nice shove of torque, each time you shift gear. More noticeable when peddling lightly
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)