RE: Question about tx
Most modern tx's allow either mode 1 or mode 2 selection.
Mode 1 is throttle and ailerons on the right stick and elevator and rudder on the left stick.
Mode 2 is elevator and ailerons on the right stick and throttle and rudder on the left stick.
Most people in the USA fly mode 2.
I fly mode 1 as this is how I was taught.
There are channels numbers on the rx which determine which servo lead is connected to which channel. i.e Channel 1 is the ailerons etc
Simplest solution is to alter the leads from the rx to the servo to get the right set up.