I have a cap switch in my shed right now collecting some dust.I had the slide switch and went to the cap thinking I could shave a second off my starting time.I quickly found out the problem wasn't the switch but the person holding it.I would let my mind wonder and think about the first corner, or is the guy next to me going to bump me getting on, or am I going to fall on my face one time getting across the track, anything but focusing on the switch itself and that thing could have been 3 inches wide and I couldn't find it.
I think everyone has had an experience like that at some time.
Practice in the back yard by running across and putting the switch on.You don't have to crank the motor, just practice in full gear so when your at the track it is like second nature to get it rolling.