Well, I did buy a new controller to make it faster and ended having a lot of problems trying to make it work. After about 20 support interactions and even software updates I gave up and went back to the original controller. Not long after the battery broke and the dealer changed the BMS. Now, from time to time, it looses power when I drive and I have to release the power throttle and pull it down again for it to work. Sometimes I see the error message 12 blink shortly. This indicates that it is the controller/battery interaction. I will get the dealer to investigate, BUT, I have a problem. The plastic lid that covers the cables on the original controller is missing! That is difficult to explain. So, anyone who knows where I can find a replacement?