Looking at the overdrive option, does this mean the following;
48v unit, 48v setting, 48v battery = 48v
36v unit, 36v setting, 48v battery = 48v overdrive
48v unit, 52v setting, 52v battery = 52v
48v unit, 48v setting, 52v battery = 52v overdrive
I'm also looking at Aliexpress and noting a lot...