Guys, guys, guys how many times do I have to say this: PRELOAD IS NOT NECESSARY (NOR IS IT EVEN POSSIBLE) on E46 bushings. This method is for E30s and E36s only that use a circular hole for the control arm. E46s have a hex-shaped hole which you couldn't preload even if you wanted. The only way you could get into trouble is if you pressed in new bushings the wrong way into the carrier. 95% of people buy the bushings preinstalled into new lollipop carriers.
NO NEED FOR PRELOAD.
Not all e46s have hex-shaped control arm ends. Mine are round, and preload is indeed an issue.