i have 2x hobbyking xcar 120a speedos they are great in my opinion i have not flashed them with hobbywing software and they run great i have one in my b44.3 with a trackstar 8.5t and the other is in my bz222 pro mated up to a hobbywing xerun 10.5t the only issue i have had is breaks are not great they work but just not how id like tell me does it really make a difference when you do it coz im a great believer in if its not broke dont fix it
