To the last two posters, I said lead with RRPM not lead with throttle - subtle difference as the throttle is not the only way to control RRPM although it is considered the primary method within limits.
When I got my ticket them governors didn't exist in Robbies and yes that narrow green band was one of my main gripes with the product as it forced you to keep looking inside at often critical stages of flight when you need to be looking outside. I also never found the correlator to be as useful as you describe it and the throttle constantly needed adjustment to keep it at the top of the green, and learning to make tiny throttle trim adjustments on that very sensitive throttle did take some time to do well. With the governor models it's a doddle and there is no need to fight it as it does a very good job when it's working well, you just maintain a light grip around the throttle (with little finger resting on the pole) in order to feel it working so that you can let your eyes focus on what's outside.