Oh and i have a JX servo in my Helion 410SC and so does my brother. They are both great and neither have died on us so you must be doing something wrong if they dont last more then a week. JX 6113MG, 0.10sec, 14kg @ 6.0v in the brothers car. JX 6221MG, 0.16sec, 20kg @ 6.0v in my helion.