Originally Posted by Pattojnr

the design of the plugs at the motor end are fine. i have no issues with them at all, infact it makes it alot easier to change your motor if need be in a hurry. im talking about the solder joints them selves. at your battery, it can effect everything. also by the spur and pinon given , i believe most of your issue is with your FDR. this will create heat regardless. try 7.5 for the 3.5T, and see if it helps your situation. but still do check all your solder joints.