Thanks Charlie & Bob,
I am just testing all my servos on my bench with the Tx, Rx & a 4.5v battery pack. I haven't even taken the RT88's out of the box yet & was using a pair of old hitecs to set the channels up.
I didn't realise the JR retract servos rotate 180d.
Do you think putting the 2 flap servos on seperate channels is a good idea?