Hi, not sure if this is right .... but here goes. Recently changed stock motors for T motors. Made sure of CW / CCW wiring. Turned Quad on and tested. On start up front right motor started in reverse then went forward. The quad still flew but on start up occasionally it began in reverse then forward (only the one motor ) Another change since motor swap is that if you hold throttle down all motors stop. this is not good..... can Anyone help?