OK then here goes.
I move into pre -stage and burn out for about 6 seconds. I then clean off the tyre by letting out the front brake and rolling out about 10 feet. This gets the tyre marbles off otherwise you have wasted your time cos you will spin off the line anyway with a dirty tyre.
Then move into stage and wait for the other guy/girl to stage. I have my weight as far forward as possible with my nuts bang up against the tank. My arms are bent almost double and my head is well forward over the screen of the bike.
I then hold the throttle open at constant revs. I don't blip the throttle. I usually hold the throttle open at anything between 7k up to 9k depending on how grippy the surface is. When the lights hit amber I drop the clutch almost completely immediately. No point waiting for the green I suppose.
As the bike leaves the line my weight is all the way forward as I can manage with my feet trailing far back. This helps me keep balance (so I am told). I trail both feet.
Once the bike is settled and happy feet come up and it is a clutchless change to second. By this time my clucth arm is behind my back and I am lying pretty much flat on the tank. My left arm is stretched out until I can almost feel the seathump behind me and my palm is open and flat to the side of the seathump/my back. This is just my way, I don't think anyone else does it but I am quite tall and once the clutch is out off the line there is nowhere for my clutch hand to go. If I leave it where it is my elbow sticks out into the wind so its easier and more comfortable to put my arm behind my back.
I make a conscious effort to pull my toes and as much of my legs tight into the side of the bike.
I change on redline, getting into 4th before the quarter.
Quarter mile markers passed I sit up and brake, return to the timing point, weep at my times and try to improve next run.
I hope that is of use to you...