Quoted from RCA1:What is staging, and what sensors are too close together?
It's where flippers of one side of a game say.... Twilight zone is a game I like to do it on... Cradling a ball on the left flipper but only pushing in the button some as to not activate the upper left flipper that way you can hold a ball below and shoot the jackpot scoop above with another ball.
Sensors meaning either mechanical leaf switches, optos, or magnets, if they are too close it becomes super hard to get breathing room between lower flipper cradled up and flipping the upper flipper. The "closer" they are the faster they flip one after the other