Do not change B44 gear shimming.
ATTENTION: Do not change from the stock shimming.
The gears are plastic and will break in, removing all the little imperfections on the teeth that make it seem tight. If you loosen up the gear mesh for when the gears are new, it will be too loose once you run the car and you will probably break gears.
Do trim away any flashing on the back side of the drive pinions.