Hydro,

I am learning as well, I fly a 4 channel trainer, I also have a 3 shannel trainer with the rudder on the right stick.

When I fly my 4 channel my trainer has me make a concious effort to approach and land with the rudder once I am leveled out. As he as explained to me this helps keep the plane flat and creates yaw to slow the plane. You really don't want to adjust by tipping a wing as you are getting close to the ground. It isn't easy to do because I want to use the right stick. He explained that landing in a cross wind this is crucial. Also when you get into rolls, loops, and others the rudder becomes necessary as well. I found that a roll with a trainer with dihedral the rudder is very important or you loose just a ton of altitude. (Thank god we tried it 3 mistakes high)

Just 2 cents from a noob.

Del