HI I'M HAVING PROBLEMS WITH MY SU-31. I HAVE A FUJI 43CC IN MINE WITH ALL SERVOS IN TAIL (3305) AND THE HYDROMAX 3600MAH FOR RECIEVER PACK, WAS A LITTLE TAIL HEAVY BUT FLEW ANYWAY. FIRST FLIGHT WENT OK KNOWING AIRCRAFT WAS TAIL HEAVY. I TOOK HOME, REBALANCED, MOVED BATTERY FORWARD AND ADDED 8OZ TO FIREWALL NOW THE PLOBLEMS!!!!!!!!! TOOK TO FIELD AND HAD ALL KIND OF RADIO INTERFERENCE IM USING AN OLDER FUTABA 8U WITH PCM RECIEVER NEVER HAD HAD PROBLEMS IN PAST BUT DOING READING ON HERE THERE IS A PROB WITH ELEC IGNITION WILL GOING TO 2.4 HELP OR DO I HAVE OTHER ISSUES. WHAT I DON'T UNDERSTAND IS WHY I DID NOT HAVE PROBLEMS FROM GET GO. PLEASE HELP.