David was just out to replace a broken torsion spring for me, and he was awesome! Not only did he hook me up with some new springs, but he also made my door almost silent with some fresh lube, fine-tuned adjustment, and some new ball-bearing rollers. He was very professional, courteous, and knowledgeable. He let me watch him and explained what he was doing. As an engineer who loves to know how things work, this was a fun experience. Thanks again!