Originally Posted by John H
you use a fairly low mounting torque to form the bedding to avoid this.
Exactly. You slowly take the screws down little by little as evenly as possible with just finger tip pressure on the screwdriver and when they touch bottom, back them off ¼ turn or so. Sight down the base with your eyeball, check with a straightedge, etc to make sure the base is flat, straight and level. Then wipe away the squeezout with Q-tips dipped in rubbing alcohol.