Dont know if I believe that video. Its not voltage... even the explanation tab that pops up says its TIME. The values there are milli seconds. If you dont have racetools, Set at 75 as base and you will be happy. You can fine tune from there onward... Shorter time, better shifting at high RPM, longer time, better on low mid throttle rpm. too short or too long and it will not shift at all.
Normal shifting is one gear down and 5 gears up
Race shift is one gear up (1st) and 5 gears down.
When you flip the gear lever shaft upside down where it connects to the gearbox, you swop the direction of your shifts around. So instead of shifting down to go to first, you will shift up to shift to first. If you do this, then the ECU will need to know that the quickshifter will push the shaft of the shifter to gear up instead of pull it.