Most of my planes have 3/8" or 1/2" for both up/down listed. I like to have a bit more so I usually just set them for 1/2" up/down. 3D planes usually have higher throws than this, but you are not supposed to fly these at high speeds. I built some planes from plans that didn't bother to list the rates. I just used the 1/2" for both up and down and this setting has worked well. [8D]