We size the replacement spring to the door's actual weight and cycle rating, not just whatever was on the shaft. On newer construction like most of what's in Elburn, that usually means matching a dual-torsion setup correctly - if one spring failed from fatigue, its matched twin is close behind, and we'll tell you that honestly rather than replace just the broken one and send you off. We check the drums, the cable condition, and the center bearing while the torsion tube is already down, since that's the only time those parts are easy to inspect. For double-wide doors, which carry more weight and more stress per spring, we confirm the wind count and bar length match the door manufacturer's spec rather than a generic replacement. The job gets done in one visit; we carry common spring sizes on the truck for this era of door.