I got 1 of these cars about a month ago and I love it. Just recently after 30 runs of 300 minutes total run time over that month, it is not receiving radio frequency commands after it gets about 35-55 meters away. I checked the Transmitter batteries fine at 1.55 vdc. I checked the 2S / 7.4 vdc / 35 C / 7.4 vdc / 2600 mah batteries fine at 7.40 vdc after a balanced charge. So we have a transmitter / receiver / electronics problem that repeats it self after getting 35-55 meters away, Can you recommend a fix? New ESC / receiver assembly ? New Transmitter ? If I buy a new transmitter do I need to worry about frequency compatibility