Using a 100 cc syringe ($5.64) and aquarium hose ($4.31) I loosened the valve one turn on the left brake and fed brake fluid through the line. I kept doing this until it began filling my overflow cup and was bubble free. I tightened the bleeder valve and did the same exercise on the right brake. I pushed enough fluid through to ensure my lines were bubble free. Also, the plastic hi-pressure tube Van’s uses for the brake lines allow you to visibly check your lines are bubble free. Using the syringe and aquarium hose worked real slick.
An overflow setup allows you to push all the bubbles out.