Chedworth R/C Club in Gloucestershire, and fly full size from Staverton Airport next to Cheltenham.

I took a look at that site, it's their opinion but certainly not a common opinion here. They do say it is just to counter adverse yaw, well if you don't suffer from adverse yaw there is no need, and most people that I know find that if they get into the habit of ground steering with the aileron stick they have to unlearn it to ground steer correctly with the rudder.

Harry