That is Real Good
I worked with a guy that lives down the road.
He kept records of temperature, barometric pressure, tire pressure and everything anyone could think of.
At a Local track, He won the Championship in his class many years in a row.
I remember him telling me that placing (moving ) weight around in different location till he found the right amount and spot was his biggest gain in his ET.
He nailed down his consistency, that's how he was able to win all the time.