Matt and Steve revisit an early Passive House-certified home built in coastal New England in 2009–2010. This Climate Zone 5A project provides an opportunity to evaluate early high-performance construction details and identify opportunities for improvement. Using 2-D and 3-D drawings, Matt and Steve explore control-layer continuity and the value of redundant protection. They explain how blower door testing during construction provides immediate feedback on air sealing, while positive and negative pressure tests reveal different weaknesses. The discussion also highlights the importance of understanding material vapor permeability, particularly when using closed-cell spray foam. The takeaway: learn from past assemblies to improve future performance.