Thank you for your continuing efforts with this issue ..this morning I took your advice and swapped over the rudder servo lead to esc , and your right , full functionality on rudder ....so, now have proved Tx & Rx are OK
Going forward need to try and reconfigure ESC or swap out .
Point of interest ....this is a water cooled ESC to link with water cooled brushless motor . If it was changed for a non cooled one and I rigged up an air cooled system for the motor , would I be up looking at a disaster in the making ?
Thanks again to everyone, you are all educating my grey cells