eye delay is how long the eye will sense a ball in the breach before allowing the marker to fire.
debounce setting is different for every marker and user. Is your marker adding shots when you fire? raise your debounce. you want it as low as possible without added shots.....unless you want added shots.
dwell is different for every marker, so follow the dwell tuning guide in the stickies. That bolt and qev combo will give you a lot of options for smoothness and efficiency.