For most beginners (like me), Dual Rate can be a problem. If you forget it's in High Rate, for instance, you may be in for a surprise once you are airborne, then you can't really take your eyes off the plane to find the switch (because you will be in panic mode and forget what switch does what) so you are going to attempt to land it and set the switch back to low rates, which will always raise your heart rate and blood pressure a few numbers.

Leave both low and high rates at 100%, or at the same rate.. so that accidentally switching from low to high means nothing. After you get used to everything, perhaps after you have burned up about 20 gallons of fuel , you can set your rates so that they are meaningful to you and your flying habits.

Best of luck with that. I lost one a few weeks ago exactly because of dual rates accidentally set at high, wind was obnoxious, the throttle was set to low for the landing condition (obnoxious head wind on landing), and I was in panic mode. A bad combination. Remove one item, dual rates, and perhaps I would still have that Goldberg Skylark 56.