Most pylon racers take-off holding ALOT of right rudder. Then slowly let it out...you cant release it all at once. I know some racers who adjuct the rudder throw so that max right rudder held during take-off keeps the plane straight. Not a normal sport plane take-off technique! So you are on the right track

Regarding elevator on landing, I do exactly what you are describing. I activate the “airbrake” feature for landing and have it add approximately 10-15% up elevator for landing. It acts like a new elevator trim posititiion. It takes a few flights to dial in the correct value. I also use it as an airspeed indicator...if the plane climbs after activating the airbrake feature, I am too fast. If I find myself holding up elevator after activating the airbrake feature, I am TOO SLOW. This is the best feature of modern transmitters.

Kurt