There really is no "normal" so to speak. The amount of washers may vary plane to plane (even left side to right side). It's all about getting the switch in a position where it will be depressed by the pin handle when the pin is properly installed and captured. You gotta do what you gotta do....
A couple RV-12s
NOTE: The information, ideas, and opinions presented in this post are my own and not those of my employer. Build, test, and fly at your own risk.