yes, this is great advice for seveal reasons.

Some years ago, a guy at our field brought out a new plane in the spring.

He fired up the motor and checked the controls, upon seeing the ailerons were reversed . He went to change the directions of the ailerons ( with servo reversing ) and got the throttle by mistake.

The plane went to full speed and was headed right for another flyer ( This is a .60 size plane ) , luckly it hit a bump went stright up an stalled the motor.

That was a good ending to a bad situation. I never do anything with a plane , with the motor running , or pluged in for elect. planes

good luck with the plane I have trained a couple people with the tower trainers ( 40 and 60 ) and they are good planes.

sticks